TWI279794B - Optical disc and its manufacturing method - Google Patents

Optical disc and its manufacturing method Download PDF

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Publication number
TWI279794B
TWI279794B TW095110609A TW95110609A TWI279794B TW I279794 B TWI279794 B TW I279794B TW 095110609 A TW095110609 A TW 095110609A TW 95110609 A TW95110609 A TW 95110609A TW I279794 B TWI279794 B TW I279794B
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TW
Taiwan
Prior art keywords
layer
substrate
information signal
film
disc
Prior art date
Application number
TW095110609A
Other languages
Chinese (zh)
Other versions
TW200634810A (en
Inventor
Minoru Kikuchi
Yoshio Shirai
Mitsuhiro Abe
Toru Abiko
Original Assignee
Sony Corp
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Publication date
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Publication of TW200634810A publication Critical patent/TW200634810A/en
Application granted granted Critical
Publication of TWI279794B publication Critical patent/TWI279794B/en

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    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
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    • G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
    • G11B7/2433—Metals or elements of Groups 13, 14, 15 or 16 of the Periodic Table, e.g. B, Si, Ge, As, Sb, Bi, Se or Te
    • G—PHYSICS
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    • G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
    • G11B2007/2571—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing group 14 elements except carbon (Si, Ge, Sn, Pb)
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    • G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
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    • G11B7/258—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers
    • G11B7/2585—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers based on aluminium

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Manufacturing Optical Record Carriers (AREA)

Abstract

On a replica substrate la, a reflection layer 11, a first dielectric layer 12 made of ZnS-SiO2, a recording layer 13 made of a phase change type recording material, and a second dielectric layer 14 made of ZnS-SiO2 are successively formed. In addition, a reaction protection layer 15 made of Si3N4 or SiO2 is formed on the second dielectric layer 14. As a result, an information signal portion 1c is composed. A light transmissivity sheet is formed through an adhesive layer so that the light transmissivity sheet coats an information signal portion 1c. As a result, a light transmission layer is composed. When the reaction protection layer 15 is not formed, a reaction protection resin layer made of an ultraviolet ray setting resin is formed so that the reaction protection resin layer coats the information signal portion 1c.

Description

1279794 九、發明說明： 【發明所屬之技術領域】 本發明係關於光碟及其製造方法，尤其關於可供適用於 採取由光透射性膜片與黏合層構成碟片基板上之光透射層 的方式之光碟者。 【先前技術】 近年來在資訊記錄領域中關於光學資訊記錄方式之各種 研發正在向前推進中。該光學資訊記錄方式具有可以非接 觸方式進行記錄/再生（recording/regeneration)操作且可達 成比磁圯錄方式高出一位數的記錄密度之優點。並且該光 學資訊記錄方式更具有可對應於再生專用型、補記型、可 重寫型等各種記憶形態之優點。因而作為可實現價廉大容 量檔案之方式而已被廣泛地應用在產業用及民生用用途。 其中’特別是關於可對應於複製專用型記憶形態之光碟 ，如數位式錄音碟（DAD ; Digital Audio Disc)或光學式錄 影碟等已普及到廣泛的範圍。 數位式錄音等光碟係具有：在形成有供顯示資訊信號的 凹坑（pit)或溝槽（gr〇〇ve)等凹凸圖案之透明基板之光碟基 板上，形成有由鋁（A1)膜等金屬薄膜構成之反射膜，且在 反射膜上形成有用以從大氣中之水分（HW)、氧氣（〇2)保護 該反射膜的保護膜之結構。 該光碟在再生資訊信號時，則將雷射光等之再生光由光 碟基板側向凹凸圖案照射，並據以該再生光的入射光與 返回光間之反射率差而取出資訊信號。 109875.doc 1279794 當欲製造像這樣的光碟時，則首4 1 J自元以射出成形法形成具 有凹凸圖案之光碟基板。接著以直空蒗 呉二療艘法在光碟基板上 然後再在其上層塗布紫外 形成由金屬薄膜構成之反射膜 線硬化樹脂，藉以形成保護膜 對於如上述之光學資訊記錄方式，近年來則要求更進一 步的高記錄密度化。於是為了對應該高記錄密度化之要求 ，曾揭露有-種使光學讀寫頭在照射再生光時所使用之物 鏡的數值孔徑（NA)改大，藉以實現再生光的光點㈣叫徑 小型化之技術。具體而言該技術係相對於在再生傳統數位 錢音碟時所使用之物鏡从為㈤，而制以再生記錄容 量具有該傳統數位式錄音碟的6至8倍之DVD(數位式多功 能光碟）等光學式錄影碟時所使用物鏡之财，？文成為〇 6〇 左右’藉此便可達成光點徑之小型化。 如果繼續演變如上述之物鏡高NAt，則必須使光碟之 碟片基板厚度作薄俾利所照射之再生光透過。這是因為光 子。貝寫頭相對於光軸而由碟片面法線偏移的角度（傾斜角） 之谷許里會變小，且該傾斜角又容易受到基板厚度造成之 像差或雙折射影響之故。因而必須儘可能使基板厚度作薄 以使傾斜角麦小。例如在上述數位式錄音碟之情況下， 則使其基板厚度設定為12瓜❿左右。相對地對於Dvd等記 錄谷ϊ較之數位式錄音碟具有6至8倍大的光學式錄影碟， 則使其基板厚度設定為〇·6 mm左右。 然而如果考量今後對於高記錄密度化的更進一步之要求 ’則基板乃需更進一步的體態薄型化。於是曾經揭露有一 109875.doc 1279794 種在基板之一主面形成凹凸而作為資訊信號部，並在該資 訊信號部上依序積層反射膜與供光透過的薄膜之光透射層 並藉著由光透射層侧照射再生光而實施資訊信號再生所 構成之光碟。如此對於由光透射層側照射再生光即可使資 訊信號再生而構成之光碟而言，謀求其光透射層之薄膜化 ’便能對應於物鏡之高NA化。 但是若採取該光透射層之薄膜化’則會對於在光碟製造 步驟十依照-般採用的使用熱可塑性樹脂的射出成形法之 光透射層形成作業造成困難。.即對於傳統技術而言欲在仍 保持著小的雙折射下形成出仍擁有良好透明性而厚度為 〇·1 mm左右之光透射層乃是極其困難。 於是曾揭露有-種以紫外線硬化樹脂形成光透射層之方 法。然以紫外線硬化樹脂形成光透射層時，在基板表面欲 使光透射層作成均勻的膜厚則將變得非常困難。因而會導 致難於穩定地再生資訊信號之問題。 另外也曾揭露有一種藉由使用黏著劑的滾輪壓接法使膜 厚為〇·1 mm且由熱可塑性樹脂構成之膜片貼合於基板表面 ，藉以形成光透射層之方法。然卻因會在壓接時發生膜片 變形或黏著劑溢出於讀出面側，而仍難於形成膜厚均勻的 光透射層且亦會更加難於穩定地再生資訊信號。 有鐘於這些問題，本發明人曾經構想-種使由供雜接於 基板的黏合層與光透射性膜片構成之膜片，黏接於基板之 設有資訊信號部的一側，藉而形成光透射層之方法。並且 揭示一種使用具有由彈性體構成之墊（pad)與由金屬構成之 109875.doc 1279794 平面σ所構成之貼合裝置，而藉由壓接光透射性膜片與基 板來貼合光透射層之方法。茲參照圖式說明該貼合裝置具 體内容如下。 如第1圖所示，傳統貼合裝置係將固定台1〇1與可動台 102設置於相對的位置而構成。 固定台101係用以擺放膜片103，其係構成為可供擺放膜 片103。即在固定台i 01的相對於可動台} 〇2之部分設有相 對於固之台101而突出且可向埋沒方向移動之上下動銷105 。該上下動銷105之徑係構成為與上述膜片1〇3的穿通孔 之k相專。並且構成為使膜片1〇3之穿通孔嵌合 於上下動銷105，即可使膜片103擺放於固定台1〇1上。另 在该上下動銷105之上部，設有突出成圓柱狀的基板定位 銷1〇6。該基板定位銷1〇6之徑，係構成為大致與上述碟片 基板104的中心孔10钧之徑相等，且構成為邊使碟片基板 104之中心對準在一起便可邊以上下動銷1〇5支撐該碟片基 板104。如上述所構成之固定台1〇1，係將膜片1〇3構成為 使其嵌合於上下動銷105即可使之擺放，而使碟片基板104 構成為邊使其嵌合於基板定位銷106即可邊以上下動銷105 之段差部分來加以支撐。 另方面，在可動台102的相對於固定台101的部分之面上 ，設有例如由橡膠等彈性體構成之墊107。該墊107具有圓 錐形狀，而該圓錐形狀之平面側係固定於可動台102的相 對於固定台101之面。 當使用經如上述構成之貼合裝置來實施碟片基板ι〇4與 109875.doc 1279794 膜片103之貼合時，則首先使膜片ι〇3以其穿通孔ι〇3&嵌合 於上下動銷105而擺放於固定台1〇1上。此時則將膜片1〇3 以使其黏合面103b側之面相對於可動台1〇2之狀態而擺放 。之後則將碟片基板104以使其中心孔104a嵌合於基板定 位銷106之狀態而擺放於上下動銷1〇5之段差部分。如此， 碟片基板104即可以上下動銷1〇5支撐成使其設有資訊信號 部的記錄面104b相對於設有黏合層的黏合面丨〇3b。1279794 IX. Description of the Invention: [Technical Field] The present invention relates to a optical disc and a method of manufacturing the same, and more particularly to a method suitable for adopting a light transmissive layer formed on a disc substrate by a light transmissive film and an adhesive layer The disc player. [Prior Art] In recent years, various research and developments on optical information recording methods in the field of information recording are moving forward. The optical information recording method has the advantage that the recording/regeneration operation can be performed in a non-contact manner and can achieve a recording density higher by one digit than the magnetic recording method. Further, the optical information recording method has an advantage that it can correspond to various memory modes such as a reproduction-only type, a supplementary type, and a rewritable type. Therefore, it has been widely used in industrial and residential applications as a method for realizing inexpensive and large capacity files. Among them, in particular, optical discs that can correspond to copy-only memory formats, such as digital audio discs (DADs) or optical video discs, have spread to a wide range. An optical disc such as a digital recording system has an aluminum (A1) film formed on a disc substrate on which a transparent substrate having a concave-convex pattern such as a pit or a groove for displaying an information signal is formed. A reflective film composed of a metal thin film has a structure in which a protective film for protecting the reflective film from moisture (HW) or oxygen (〇2) in the atmosphere is formed on the reflective film. When the information signal is reproduced, the optical disk is irradiated with the reproducing light such as laser light from the side of the optical disk substrate to the concave-convex pattern, and the information signal is taken out based on the difference in reflectance between the incident light of the reproducing light and the returning light. 109875.doc 1279794 When a disc such as this is to be manufactured, the first 41 J self-element is formed into a disc substrate having a concavo-convex pattern by injection molding. Then, in the direct space 蒗呉 two therapy method on the optical disk substrate and then the upper layer is coated with ultraviolet light to form a reflective film line hardening resin composed of a metal film, thereby forming a protective film. For the optical information recording method as described above, in recent years, it is required Further high recording density. Therefore, in order to meet the requirements of high recording density, it has been revealed that the numerical aperture (NA) of the objective lens used for the optical pickup to illuminate the reproducing light is increased, thereby realizing the spot of the reproducing light (four). Technology. Specifically, the technology is compared with the objective lens used in reproducing a conventional digital audio disc (5), and the reproduction recording capacity is 6 to 8 times that of the conventional digital recording disc (digital versatile disc) ) What is the use of objective lenses when using optical video discs? The text becomes 〇 6〇 or so, and the miniaturization of the spot diameter can be achieved. If the objective lens height NAt as described above continues to evolve, the thickness of the disc substrate of the optical disc must be transmitted through the regenerated light irradiated by the thin film. This is because of the photon. The angle at which the bay write head is offset from the optical axis by the normal angle of the disc surface (inclination angle) becomes small, and the tilt angle is easily affected by the aberration or birefringence caused by the thickness of the substrate. Therefore, it is necessary to make the thickness of the substrate as thin as possible so that the inclination angle is small. For example, in the case of the above-described digital recording disc, the thickness of the substrate is set to about 12 ❿. In contrast, for optical recording discs such as Dvd which are 6 to 8 times larger than the digital recording discs, the thickness of the substrate is set to about 〇·6 mm. However, if we consider the further requirements for high recording density in the future, the substrate needs to be further thinned. Therefore, it has been revealed that there is a 109875.doc 1279794 type of concave and convex surface formed on one main surface of the substrate as an information signal portion, and a light transmissive layer of a reflective film and a film for transmitting light is sequentially laminated on the information signal portion and by light The transmission layer side irradiates the reproduction light to perform the optical disc composed of the information signal reproduction. As a result, the optical disk formed by regenerating the reproduction light by the light-transmitting layer side can reproduce the thinning of the light-transmitting layer, which can correspond to the high NA of the objective lens. However, if the thin film formation of the light transmitting layer is employed, it will be difficult for the light transmitting layer forming operation using the injection molding method of the thermoplastic resin which is generally employed in the optical disk manufacturing step. That is, it is extremely difficult for conventional techniques to form a light transmissive layer having a good transparency and a thickness of about 1 mm while still maintaining a small birefringence. Thus, a method of forming a light transmitting layer with an ultraviolet curable resin has been disclosed. When the light transmitting layer is formed of an ultraviolet curable resin, it is extremely difficult to make the light transmitting layer have a uniform film thickness on the surface of the substrate. This can lead to problems in that it is difficult to stably regenerate information signals. Further, there has been disclosed a method in which a film having a film thickness of 〇·1 mm and a film made of a thermoplastic resin is bonded to the surface of a substrate by a roller bonding method using an adhesive to form a light transmitting layer. However, since the film deformation or the adhesive overflows on the reading surface side at the time of crimping, it is still difficult to form a light transmissive layer having a uniform film thickness and it is more difficult to stably regenerate the information signal. In view of these problems, the present inventors have conceived that a film formed of an adhesive layer and a light-transmitting film for being bonded to a substrate is bonded to the side of the substrate on which the information signal portion is provided. A method of forming a light transmissive layer. And a bonding device comprising a pad composed of an elastomer and a 109875.doc 1279794 plane σ made of metal is disclosed, and the light transmissive layer is bonded by crimping the light transmissive film and the substrate. The method. The details of the bonding apparatus will be described below with reference to the drawings. As shown in Fig. 1, the conventional bonding apparatus is constructed by arranging the fixed table 1〇1 and the movable table 102 at opposite positions. The fixing table 101 is for placing the diaphragm 103, which is configured to be placed on the diaphragm 103. That is, the portion of the fixed table i 01 with respect to the movable table 〇 2 is provided so as to protrude relative to the fixed table 101, and the upper and lower movable pins 105 can be moved in the burying direction. The diameter of the upper and lower movable pins 105 is configured to be specific to the k of the through hole of the diaphragm 1〇3. Further, the diaphragm 103 is placed on the fixed table 1〇1 so that the through hole of the diaphragm 1〇3 is fitted to the upper and lower movable pins 105. Further, on the upper portion of the upper and lower moving pins 105, a substrate positioning pin 1〇6 projecting in a cylindrical shape is provided. The diameter of the substrate positioning pin 1〇6 is substantially equal to the diameter of the center hole 10钧 of the disc substrate 104, and is configured to be aligned with the center of the disc substrate 104. The disc substrate 104 is supported by 1〇5. In the fixing table 1〇1 configured as described above, the diaphragm 1〇3 is configured such that it can be fitted to the vertical moving pin 105, and the disc substrate 104 is configured to be fitted to the substrate. The positioning pin 106 can be supported by the stepped portion of the upper and lower moving pins 105. On the other hand, a pad 107 made of an elastic body such as rubber is provided on the surface of the movable table 102 with respect to the portion of the fixed table 101. The pad 107 has a conical shape, and the planar side of the conical shape is fixed to the surface of the movable table 102 with respect to the fixed table 101. When the bonding of the disc substrate ι4 to the 109875.doc 1279794 diaphragm 103 is carried out using the bonding apparatus constructed as described above, the diaphragm ι 3 is first fitted with its through-hole 〇3& The upper and lower moving pins 105 are placed on the fixed table 1〇1. At this time, the diaphragm 1〇3 is placed with the surface on the side of the bonding surface 103b facing the movable table 1〇2. Thereafter, the disc substrate 104 is placed on the stepped portion of the upper and lower moving pins 1 and 5 with the center hole 104a fitted to the substrate positioning pin 106. Thus, the disc substrate 104 can be supported by the upper and lower movable pins 1〇5 so that the recording surface 104b provided with the information signal portion is opposed to the bonding surface 丨〇3b provided with the adhesive layer.

接著使可動台102向固定台101移動（第一圖中下方）。基 以墊107先按壓基板定位銷1〇6，接著介以碟片基板而 使上下動銷1〇5壓入於固定台1〇1中。藉此，碟片基㈣ 與膜片103之間隙就逐漸變小，最後碟片基板1〇4與膜片 1〇3就被壓接而使記錄面1G4b與黏合面職相黏接。該麼 接經趨於穩定後，則使可動台1G2向由固定台⑻離遠的方 向開放》之後則使用特定的搬送裝置（未圖示）由自定台⑻ 搬出經予壓接成之碟片基板104與膜片103。 口Next, the movable table 102 is moved to the fixed stage 101 (lower in the first figure). The pad 107 is first pressed against the substrate positioning pin 1〇6, and then the upper and lower movable pins 1〇5 are pressed into the fixed table 1〇1 via the disk substrate. Thereby, the gap between the disc base (4) and the diaphragm 103 is gradually reduced, and finally the disc substrate 1〇4 and the diaphragm 1〇3 are crimped to bond the recording surface 1G4b to the bonding surface. After the connection is stabilized, the movable table 1G2 is opened in the direction away from the fixed table (8), and then the pre-pressed disk is carried out from the custom table (8) using a specific conveying device (not shown). The substrate 104 and the diaphragm 103. mouth

經由上述過程即能製得使碟片基板1〇4與膜片ι〇3相貼人 且在碟片基板m之記錄面職上設有光透射層之光碟 經如上述所形成具有光透射層之光碟仍具有於 生時所使用物鏡的高NA化之優點。 α於再 並就該光碟進行 ’卻得知仍有如 然經由本發明人反覆上述光碟之製造， 各種實驗且根據該實驗結果加以檢討結果 下述之問題存在著。 ㈣成有光透射層〜—r，若在資 用相位變化型記錄材料，通常 化 1口唬部之最表層 W9875.doc -10- 1279794 則使用透明的電介體之硫化鋅與氧化矽的混合物（zns_Through the above process, a disc having the disc substrate 1〇4 attached to the diaphragm ι 3 and having a light transmitting layer on the recording surface of the disc substrate m can be obtained by having a light transmitting layer as described above. The optical disc still has the advantage of high NA of the objective lens used during birth. α 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 (4) Forming a light-transmissive layer ～r, if the phase-change recording material is used, the outermost layer of the 唬 part is generally used. W9875.doc -10- 1279794 uses transparent dielectric zinc sulfide and yttrium oxide. Mixture (zns_

SiOJ ’並且使光透射性膜片介以由壓敏性黏著劑構成之 黏合層而貼合於作為最表層而設有該ZnS_Si〇2層之資訊信 號部上。 、口 然而經由本發明人對於設有該光透射層之複數片光碟施 加加速試驗而測試這些光碟之反射率結果，得知卻有反射 率竟會下降之問題存在。如此反射率—下降，則將導致難 於仍在保持著高可靠性下對於設有光透射層之光碟施加資 訊信號之記錄或再生。 有鑑於此，本發明之目的乃在於關於在基板之一主面上 介以黏合層而貼合有光透射性膜片所構成之光碟，提供一 種能抑制各光碟彼此間之反射膜不穩定性、或該光碟之記 錄/再生面的反射率變動 ，且能對應於進行記錄/再生時所 使用的物鏡之高NA化，而雙折射小、透明性佳且具有均 勻膜厚的光碟，及能提鬲製造良率的光碟之製造方法。 【發明内容】 為解決傳統技術所存在之上述課題，本發明人曾經專心 加以檢討。玆將其概要說明如下。 如上述，若根據本發明人經由實驗所得之見解，當將光 透射性膜片與碟片基板介以由壓敏性黏著劑構成之^合層 貼合而製造光碟時，在複數之光碟上一定會造成反射率之 不穩定性，或在光碟之記錄/再生面内造成局部性的反射 率之不穩定性。於是本發明人則針對於這些光碟再進一步 實施觀察與實驗。結果發現造成反射率不穩定性之原因乃 109875.doc -11 - 1279794 在於光透射層之部分會變色成黃色（黃變）所造成。 於是本發明人則再進一步尋找這 、佩的頁變之發生原因， 並反覆檢討結果，想到其原因似兔 U似為用在構成光碟之資訊信 號部積層膜的由ZnS-Si〇2構成之電介興蘇^ ^ 人< 电；丨體層，與壓敏性黏著 劑間之化學反應所引起1將之與上述本發明人之見解综 合考量’ m會影響到壓敏性黏著劑者乃以鋅(zn)為主之可 能性高，惟可能也有硫（S)之影響。 但是在光碟之資訊信號部中供為以夾住記錄層之狀態所 設置電介體膜之材料，若考量記錄特性等，則仍以落 S1〇2為宜，因而多半是使料—類者。實際上供為以夹住 記錄層之狀態所設置電介體膜之材料，即使也有由落The SiOJ' is bonded to the information signal portion in which the ZnS_Si2 layer is provided as the outermost layer by interposing the light-transmitting film through an adhesive layer composed of a pressure-sensitive adhesive. However, the inventors have tested the reflectance of these optical discs by applying an acceleration test to a plurality of optical discs provided with the light-transmitting layer, and it has been found that there is a problem that the reflectance is lowered. Such a reflectance-decreasing result in difficulty in recording or reproducing the application of the information signal to the optical disc having the light transmitting layer while still maintaining high reliability. In view of the above, an object of the present invention is to provide an optical disc in which a light transmissive film is bonded to an active surface of one of the main surfaces of the substrate, and to provide a reflection film instability between the optical discs. Or the reflectance of the recording/reproduction surface of the optical disk is changed, and it is compatible with the high NA of the objective lens used for recording/reproduction, and the optical disk having a small birefringence, good transparency, and uniform film thickness, and A method of manufacturing a disc that produces a yield. SUMMARY OF THE INVENTION The present inventors have focused on reviewing the above problems in the conventional art. A summary of this is given below. As described above, according to the findings obtained by the inventors of the present invention, when the optically transmissive film and the disc substrate are bonded to each other by a pressure-sensitive adhesive, the optical disc is manufactured on a plurality of optical discs. It is bound to cause instability of the reflectance or localized reflectance instability in the recording/reproduction surface of the optical disc. The inventors then further observed and experimented with these optical discs. As a result, it was found that the cause of the instability of the reflectance is caused by the fact that the light transmissive layer is discolored to yellow (yellowing) in 109875.doc -11 - 1279794. Therefore, the inventors further searched for the cause of this page change, and repeatedly reviewed the results, thinking that the reason is that the rabbit U seems to be composed of ZnS-Si〇2 used in the laminated film of the information signal portion constituting the optical disk.介介兴^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The possibility of zinc (zn) is high, but it may also be affected by sulfur (S). However, in the information signal portion of the optical disc, the material of the dielectric film provided in the state in which the recording layer is sandwiched is provided. If the recording characteristics and the like are taken into consideration, it is preferable to fall S1〇2, and thus most of them are materials. . Actually, it is provided as a material for setting the dielectric film in a state of sandwiching the recording layer, even if it is dropped

Si02以外之材料構成之情況，但仍有可能因壓敏性黏著劑 之，應而會造成黏合層之變色。加上在光碟之記錄再生特 〖生等各種特性上’電介體膜之材料乃是重要的構成要素。 因此關於電介體膜之材料方面乃有眾多有關提高特性上之 限制，故仍然是非常難於以其他材料取而代之。 本發明人經在考量上述各問題下就光透射層之黏合層的 汽變’特別是關於防止黃變之方法方面反覆加以檢討，結 果想到在資訊信號部與壓敏性黏著劑間插入而加設不致與 構成黏合層的壓敏性黏著劑產生反應的材料之方法。另外 本發明人經就不致與壓敏性黏著劑間產生反應之材料進行 眾夕仏付、實驗的結果，得到作為該材料乃以諸如氧化石夕 或氧化矽等之電介體的無機材料，或紫外線硬化樹脂等之 有機材料為適當之見解。 _75.doc -12- 1279794 依照如上所述本於日月人 一 I月人之專心檢討，為了確保良好的反 射=，則應以在光碟之傳統資訊信號部上層在光透射層之 下面叹置電介體無機材料或由有機材料構成之反應 防止層為宜。並且該材料乃以氮化石夕、氧化石夕及紫外線硬 化樹脂為更為適當。 因此為達成上述目的，本發明第—發明之光碟，係在基 面上σ又有由複數之層構成且構成為可將資訊信 號加以記錄及/或力σ |4 _欠 及加以再生之資訊信號部，與構成為可將用 以資訊信號之記錄及/或再生的#射光透過之光透射層者， 其特徵為： 光透射層至少包括有具有光透射層之膜片，與用以使膜 片黏接於基板之一主面的黏合層，且 在資訊信號部之黏合層側設有反應防止層。 在該第一發明中典型的是反應防止層係由電介體構成。 另外較理想為電介體為氮化矽（siN、以川4)，而由該氮化 矽構成之反應防止層之膜厚為2 nm以上。另外構成反應防 止層之電介體亦可使用氧化矽（si02),較理想為由該氧化 矽構成之反應防止層之膜厚為2 nm以上。 在該第一發明中典型的是光透射層之膜厚為9〇 μιη以上 11 Ο μιη 以下。 本發明第二發明之光碟，係在基板之一主面上，設有由 複數之層構成且構成為可將資訊信號加以記錄及/或加以 再生之資訊信號部，與構成為可將用以資訊信號之記錄及 /或再生的雷射光透過之光透射層者，其特徵為： 109875.doc -13- 1279794 光透射層至少包括有具有光透射層之膜片，與用以使膜 片黏接於基板之一主面的黏合層，且 在資訊信號部與黏合層之間設有由有機材料構成之反應 防止層。 在該第二發明中典型的是有機材料為紫外線硬化樹脂， 車乂理想為在紫外線硬化樹脂中含有溶劑。該溶劑雖以甲氧 基丙醇（1^化〇町1>1*〇1^11〇1)為較理想，但也可使用其他溶劑。 在該第二發明，係於申請專利範圍第10項之光碟中典型 的是至少在設有資訊信號部的區域之反應防止層膜厚為i (Lilli 以下。 在該第二發明中典型的是光透射層之膜厚為90 μπι以上 110 μηι以下。 在該第二發明中典型的是有機材料係由一照射紫外線即 會硬化之紫外線硬化樹脂構成，具體而言可使用丙烯酸酯 (acrylate)系、硫醇（thi〇ls)系、環氧（ep〇xy)系、矽酮 (silicone)系等之糸外線硬化樹脂。惟反應防止層使用紫外 線硬化樹脂時，典型的是至少應對紫外線硬化樹脂照射紫 外線而使其硬化，藉而形成反應防止層。另外在本發明中 ’對於當作有機材料而選擇之樹脂，當可自由選擇其各自 所適合的硬化方法。 本發明第三發明之光碟，係在基板之一主面上，設有構 成為可將資訊信號加以記錄及/或加以再生之資訊信號部 ，與構成為可將用以資訊信號之記錄及/或再生的雷射光 透過之光透射層者；其特徵為·· 109875.doc -14- 1279794 光透射層至少包括有具有光透射層之膜片，與用以使膜 片黏接於基板之一主面的黏合層，且 資訊信號部係由自接近於基板之—側起至少將構成為可 反射雷射光之反射層、第—電介體層、構成為可記錄資訊 信號之記錄層、以及第二電介體層予以積層而成之積層膜 所構成，且 ' 苐一電介體層之膜厚係設定成使基板平坦面之雷射光反 射率成為15%以上。 在該第三發明中，為使雷射光反射率設定成15%以上， 典型的是第二電介體層之膜厚為45 nm以上90 nm以下，或 130 nm以上175 nm以下。 在該第二發明中典型的是第二電介體層係由硫化鋅與氧 化矽之混合物構成。 本發明第四發明之光碟之製造方法，其係具有在基板之 一主面上形成構成為可將資訊信號加以記錄及/或加以再 生的資訊信號部之步驟，與 在覆蓋資訊信號部之區域介以黏合層而貼合構成為可供 用以資訊信號之記錄及/或再生的雷射光透過之光透射性 膜片之步驟者；其特徵為： 在資訊信號部之最表層形成有反應防止層而構成者。 在該第四發明中典型的是反應防止層係由電介體構成， 具體而言電介體為氮化矽或氧化矽。另外則將由氮化矽或 氧化碎構成之反應防止層的膜厚形成為2 nm以上。 在該第四發明中典型的是黏合層係由壓敏性黏著劑構成。 109875.doc -15- 1279794 在該第四發明中較理想為將光透射層之膜厚形成為9〇 μπι以上110 μιη以下。 本發明第五發明之光碟之製造方法，其係具有在基板之 主面上形成構成為可將資訊信號加以記錄及/或加以再 生的資訊信號部之步驟，與 在覆蓋 > 亂彳§號部之區域介以黏合層而貼合構成為可供 用以資訊信號之記錄及/或再生的雷射光透過之光透射性 膜片之步驟者，其特徵為： 在形成資訊信號部之步驟後，在貼合光透射性膜片的步 驟之前， 至少在資訊信號部上層形成由有機材料構成之反應防止 層而構成者。 在該第五發明中，為使紫外線硬化樹脂等之有機材料至 少覆蓋著資訊信號部上之全面而遍布，較理想為經使液體 狀之紫外線硬化樹脂滴下於基板後，使基板在對於其平面 圓環形狀之面成垂直且在平面圓環形狀之中心的軸之周圍 而旋轉。就是說以旋塗法等，使紫外線硬化樹脂以覆蓋資 訊信號部之方式而形成。此外若在紫外線硬化樹脂中加添 有溶劑，則在經施加依照旋塗法之塗布後，使該溶劑氣化。 在該第五發明中典型的是有機材料為紫外線硬化樹脂， 且在该紫外線硬化樹脂中含有溶劑，藉以減少基板上之内 外周膜厚差。並且在該第五發明中較理想為在基板上設有 資訊信號部之區域的反應防止層之膜厚形成為i μηι以下。 在该第五發明中典型的是將光透射層之膜厚形成為9〇 109875.doc -16- 1279794 μηι以上11 〇 μιη以下。 在本么明中較理想為資訊信號之膜厚為丨nm以上3 13 nm以下。 在本發明中，為抑制黏合層與資訊信號層的最表層之反 應而防止黏合層之變色，典型的是反應防止層係由電介體 構成，且為更確實地抑制黃變，則該電介體較理想為氮化 矽（Si3N4-x (〇Sx$ i、特別是 Si3N4))、或氧化矽（Si〇x $ 2、特別是Si〇2、Si〇))。另外該電介體也可使用諸如： 氮化鋁（Α1ΝΧ (〇·5$χ$丨、特別是AIN))、氧化鋁（Αΐ2〇3χ (〇 $ 1、特別是氧化鋁（Al2〇3))、氧化鎂、氧化 釔（Y2O3)、酸鋁化鎂（MgAl2〇4)、氧化鈦（Ti〇x (1$χ^2、 特別疋Ti02))、酸鈦化鋇（BaTi〇3)、酸鈦化锶（以丁丨〇3)、氧 化鈕（TaWs.JOgxSi、特別是丁以仏））、氧化鎵（(^〇χ(ι^The material is composed of materials other than Si02, but it may still cause discoloration of the adhesive layer due to the pressure sensitive adhesive. In addition, it is an important component of the material of the dielectric film in terms of various characteristics such as recording and reproduction of optical discs. Therefore, there are many limitations on the material properties of the dielectric film, so it is still very difficult to replace it with other materials. The inventors have repeatedly reviewed the vaporization of the adhesive layer of the light transmitting layer in consideration of the above problems, particularly regarding the method for preventing yellowing, and as a result, it is thought that the information signal portion and the pressure sensitive adhesive are inserted and added. A method of forming a material which does not react with a pressure-sensitive adhesive constituting the adhesive layer is provided. Further, the present inventors obtained an inorganic material which is a dielectric material such as oxidized stone or cerium oxide, as a result of an experiment in which the material which does not react with the pressure-sensitive adhesive is subjected to an experiment. Or an organic material such as an ultraviolet curing resin is an appropriate viewpoint. _75.doc -12- 1279794 According to the above-mentioned focus on the people of the moon and the moon, in order to ensure good reflection =, the upper layer of the traditional information signal part of the disc should be slanted under the light transmission layer. A dielectric inorganic material or a reaction preventing layer composed of an organic material is preferred. Further, the material is more suitably a nitride stone, a oxidized stone, and an ultraviolet hardening resin. Therefore, in order to achieve the above object, the optical disc of the first invention of the present invention is composed of a plurality of layers on the base surface σ and configured to record information signals and/or force σ |4 _ under-reproduced information. a signal portion, and a light transmitting layer configured to transmit the light emitted by the recording and/or reproducing of the information signal, wherein the light transmitting layer includes at least a film having a light transmitting layer, and The film is adhered to the adhesive layer on one main surface of the substrate, and a reaction preventing layer is provided on the adhesive layer side of the information signal portion. In the first invention, it is typical that the reaction preventing layer is composed of a dielectric. Further, it is preferable that the dielectric material is tantalum nitride (siN, Ishigawa 4), and the film thickness of the reaction preventing layer composed of the tantalum nitride is 2 nm or more. Further, ruthenium oxide (si02) may be used as the dielectric material constituting the reaction prevention layer, and it is preferable that the film thickness of the reaction prevention layer composed of the ruthenium oxide is 2 nm or more. In the first invention, it is typical that the film thickness of the light transmitting layer is 9 〇 μηη or more and 11 Ο μιη or less. The optical disc according to the second aspect of the present invention is provided on one main surface of the substrate, and is provided with an information signal portion composed of a plurality of layers and configured to record and/or reproduce information signals, and is configured to be used for The information signal is recorded and/or reproduced by the transmitted light of the laser light, and is characterized by: 109875.doc -13- 1279794 The light transmitting layer includes at least a film having a light transmitting layer, and is used to adhere the film The adhesive layer is connected to one main surface of the substrate, and a reaction preventing layer made of an organic material is provided between the information signal portion and the adhesive layer. In the second invention, it is typical that the organic material is an ultraviolet curable resin, and the rut preferably contains a solvent in the ultraviolet curable resin. Although the solvent is preferably methoxypropanol (1^〇〇町1>1*〇1^11〇1), other solvents may be used. In the second invention, in the optical disk of the tenth aspect of the patent application, the film thickness of the reaction preventing layer at least in the region where the information signal portion is provided is i (Lilli or less. In the second invention, it is typical The film thickness of the light-transmitting layer is 90 μm or more and 110 μm or less. In the second invention, it is typical that the organic material is composed of an ultraviolet curable resin which is hardened by irradiation with ultraviolet rays, and specifically, an acrylate system can be used. An externally-cured resin such as a thiol (thi〇ls), an epoxy (ep〇xy) or a silicone. When the ultraviolet light-curing resin is used as the reaction preventing layer, it is typical to at least cure the ultraviolet curing resin. The reaction is prevented by irradiation with ultraviolet rays, thereby forming a reaction preventing layer. Further, in the present invention, the resin selected as the organic material can be freely selected from the respective curing methods. It is provided on one main surface of the substrate, and is provided with an information signal portion configured to record and/or reproduce the information signal, and is configured to record the information signal. And/or a transmitted light transmitting layer through which the laser light is transmitted; characterized in that: 109875.doc -14- 1279794 The light transmitting layer comprises at least a film having a light transmitting layer, and is used for bonding the film to the substrate The adhesive layer of one of the main faces, and the information signal portion is configured to be at least a reflective layer capable of reflecting the laser light, a first dielectric layer, and a recording layer capable of recording an information signal, from a side close to the substrate, And a laminated film in which the second dielectric layer is laminated, and the film thickness of the first dielectric layer is set such that the laser light reflectance of the flat surface of the substrate is 15% or more. In the third invention, In order to set the laser light reflectance to 15% or more, it is typical that the film thickness of the second dielectric layer is 45 nm or more and 90 nm or less, or 130 nm or more and 175 nm or less. In the second invention, the second is typical. The dielectric layer is composed of a mixture of zinc sulfide and cerium oxide. The method for manufacturing an optical disk according to the fourth invention of the present invention has a structure formed on one main surface of the substrate to record and/or reproduce information signals. Information Signal Department And a step of bonding the light transmissive film formed by the laser light to be used for recording and/or reproducing the information signal through the adhesive layer in the region covering the information signal portion; and the feature is: In the fourth invention, it is typical that the reaction preventing layer is made of a dielectric material, and specifically, the dielectric material is tantalum nitride or hafnium oxide. The film thickness of the reaction preventing layer composed of tantalum nitride or oxidized powder is 2 nm or more. In the fourth invention, it is typical that the adhesive layer is composed of a pressure-sensitive adhesive. 109875.doc -15- 1279794 In the fourth invention, it is preferable that the film thickness of the light transmitting layer be 9 μm or more and 110 μm or less. A method of manufacturing an optical disc according to a fifth invention of the present invention, comprising the step of forming an information signal portion configured to record and/or reproduce an information signal on a main surface of the substrate, and covering the surface a portion of the portion that is bonded to the light transmissive film that is configured to be used for recording and/or reproducing the information signal through the adhesive layer, and is characterized in that: after the step of forming the information signal portion, Before the step of bonding the light-transmitting film, at least a reaction preventing layer made of an organic material is formed on the upper layer of the information signal portion. In the fifth invention, in order to cover the entire surface of the information signal portion with at least the organic material such as the ultraviolet curable resin, it is preferable that the liquid ultraviolet ray-curable resin is dropped on the substrate, and the substrate is placed on the surface. The face of the ring shape is rotated perpendicular to the axis of the center of the planar ring shape. In other words, the ultraviolet curable resin is formed by covering the information signal portion by a spin coating method or the like. Further, when a solvent is added to the ultraviolet curable resin, the solvent is vaporized after application by a spin coating method. In the fifth invention, the organic material is typically an ultraviolet curable resin, and a solvent is contained in the ultraviolet curable resin to reduce the difference in inner and outer peripheral film thickness on the substrate. Further, in the fifth invention, it is preferable that the film thickness of the reaction preventing layer in the region where the information signal portion is provided on the substrate is i μηι or less. In the fifth invention, it is typical that the film thickness of the light transmitting layer is 9 〇 109875.doc -16 - 1279794 μηι or more and 11 〇 μηη or less. In the present invention, the film thickness of the information signal is preferably 丨nm or more and 3 13 nm or less. In the present invention, in order to suppress the discoloration of the adhesive layer by suppressing the reaction between the adhesive layer and the outermost layer of the information signal layer, it is typical that the reaction preventing layer is composed of a dielectric and the yellowing is more reliably suppressed. The mediator is preferably tantalum nitride (Si3N4-x (〇Sx$ i, especially Si3N4)), or yttrium oxide (Si〇x $ 2, especially Si〇2, Si〇). In addition, the dielectric can also be used, for example: aluminum nitride (Α1ΝΧ(〇·5$χ$丨, especially AIN)), alumina (Αΐ2〇3χ (〇$1, especially alumina (Al2〇3)) ), magnesium oxide, yttrium oxide (Y2O3), magnesium aluminophosphate (MgAl2〇4), titanium oxide (Ti〇x (1$χ^2, especially 疋Ti02)), barium titanate (BaTi〇3), Barium titanate (with Dings 3), Oxidation button (TaWs.JOgxSi, especially Ding), Gallium Oxide ((^〇χ(ι^)

U2))、碳化石夕（SiC)、硫化鋅（ZnS)、硫化錯（pbs)、Ge-N 、Ge_N-0、Si-N-0、氟化鈣（CaF)、氟化鑭（LaF)、氟化鎂 (MgFd、氟化鈉（NaF)、氟化鈦（TiF4)等。此外也可使用以 這些材料為主成分之材料，或這些材料之混合物，例如 A1N-Si02 〇 在本發明中典型的疋基板具有平面圓環形狀，且光透射 性膜片也具有平面圓環形狀。且在本發明中為了形成具有 光透射性膜片的光透射層，則在沖孔成平面圓環形狀的膜 片之一方的面設置黏合層，並使基板與膜片介以該黏合層 而貼合，藉以將光透射層形成於基板上。另在本發明中典 型的是具有平面圓環形狀的膜片之内徑係構成為大於具有 109875.doc -17、 1279794 平面圓環形狀的基板之内徑，同時具有平面圓環形狀的膜 片之外徑係構成為小於具有平面圓環形狀的基板之外徑。 在本發明中典型的是黏合層係由壓敏性黏著劑（PSA)構 成。 在本發明中，為使經製造出之光碟的翹曲或變形控制於 最小限度，較理想$光透射性臈片係、由與使用於基板的材 料為同一類型材料構成。另外關於光透射性膜片之厚度， 典型的是構成為比基板厚度為薄，具體而言，可選自3〇 μιη以上150 μιη以下之範圍。另在本發明中，碟片基板係 使用聚碳酸醋（PC)或環烯烴聚合物（cycl〇〇lefine p〇lymer) 等低吸水性樹脂，另外光透射性膜片，較理想為由與碟片 基板相同材料構成。此外可供使用於基板之材料則有：例 如由鋁（A1)等金屬構成之基板，或玻璃基板，或聚烯烴 (polyoleHne)、聚醯亞胺（polyimides)、聚醯胺（p〇lyamide) 、對苯基硫醚、聚對苯二甲酸乙二酯（p〇lyethylene terephthalate ; PET)等樹脂構成之基板。另外光透射性膜 片’典型的是由聚碳酸酯樹脂構成，但亦可由其他樹脂材 料構成。 在本發明中’為了防止光透射性膜片即使在供使用於貼 合碟片基板與膜片的貼合裝置上用來擺放膜片的面上有異 物存在之情況下，也不致因該異物而受傷，或產生凹部， 較理想為膜片宜由光透射性膜片、黏合層、以及用以保護 光透射性膜片之保護層來構成。該保護層係設在與設有光 透射性膜片之黏合層的一側成相反的一側者。該保護層較 i09875.doc -18 - 1279794 理想為由聚對苯二甲酸乙二酯（PET)膜片或聚莕二甲酸乙 二酯（polyethylene naphthalate; pEN)膜片等構成。具體而 言，在該PET膜片或PEN膜片等保護薄膜之至少一方的面 被蓋第二黏著劑，並使被蓋有該第二黏著劑之面黏接於光 透射性膜片之一面，藉以構成供貼合於碟片基板之膜片。 在本發明中典型的是光透射性膜片，係由至少可將用以 二貝訊信號之記錄/再生而由GaN系半導體雷射器（發光波長 4〇〇 nm、藍色發光）、ZnSe系半導體雷射器（發光波長5〇〇 nm 、綠色發光）、或AlGalnP系半導體雷射器（發光波長 635〜680 nm左右、紅色發光）等所照射之雷射光透過的非 磁性材料構成’具體而言’係由聚碳酸S旨等具有光透射性 之熱可塑性樹脂構成。 本發明可適用於DVR(數位式錄影系統）等具有薄的光透 射層之光碟，如構成為以發光波長為650 nm左右之半導體 雷射進行資訊信號之記錄或再生之所謂的DVR-red，或構 成為以發光波長為400 nm左右之半導體雷射進行資訊信號 之記錄或再生之所謂的DVR-blue等光碟。該DVR較理想為 構成為使用藉由串聯組合兩個透鏡而使NA提高至0.85左右 之物鏡來記錄資訊信號，具體而言其以單面就具有22GB 左右之記錄容量。另外適合於應用本發明之光碟雖為上述 DVR等收容在片盒（cartridge)之光碟，但本發明之適用對 象並非侷限於收容在片盒者。 若依照如上述所構成根據本發明之光碟及其製造方法， 則由於至少以光透射性膜片與用以使該光透射性膜片黏接 109875.doc -19· 1279794 於基板主面之黏合層來構成光透射層，且以反應防止層構 成相接於資訊信號部黏合層的面之層，因此能防止黏合層 與構成資訊信號部的電介體層間之化學反應。 【實施方式】 茲配合圖式就本發明之實施形態說明如下。在下述實施 形態之所有圖式中，對於具有相同或相對應之部分則附註 以相同元件符號。 首先說明依照本發明第1實施形態之光碟。於第2圖顯示 依照本發明第1實施形態之光碟。 如第2圖所示，在該依照本發明第丨實施形態之光碟中碟 片基板1係在複製（replica)基板la之中心部形成有中心孔^ ，並在形成有凹凸之一主面上設有資訊信號部lc。另在該 碟片基板1上設有光透射層2。該光透射層2係使光透射性 膜片2a介以黏合層2b黏接而構成者，其中央部設有穿通孔 2c 〇 在光透射層2之光透射性膜片2a側主面的穿通孔以之周 邊’夾住（cramp)區域3係設定成圓環狀。該圓環狀夾住區 域3之最内周徑為例如23 mm，而最外周徑為例如33 mm。 在孩夾住區域3中的光透射層2之光透射性膜片2&側主面上 ，没疋有夾住基準面3a,俾將光碟夾住或擺放於記錄再生 裝置轉軸（皆未圖示）時之用，如上述，若考量光透射性膜 片2a係須經中介以黏合層2b而黏接於碟片基板1之一主面 上，穿通孔2c之徑則須設定為大於碟片基板1的中心孔^ 之徑’例如設定為15 mm以上。另外若考量夾住基準面3a 109875.doc -20- 1279794 必須由光透射層2之光透射性膜片2a側主面來構成，穿通 孔2c之徑則須設定為夹住區域3之最内周徑以下，具體而 言例如設定為23 mm以下。 接著，說明依照如上述所構成第丨實施形態的光碟之製 造方法。於第3圖顯示充當為該光碟之支撐體的碟片基板 ，於第4圖顯示該碟片基才反之詳細結構，於第5圖顯示供貼 合於碟片基板之膜片。 依照該第1實施形態的光碟之製造方法，係如第3圖所示 首先準備供形成光透射層之碟片基板丨。該碟片基板i係在 複製基板la之中心部形成有中心孔lb，在形成有凹凸之一 主面上設有資訊信號部1 c。 複製基板1 a係經由使用特定的沖頭之射出成形法所製得 者。忒複製基板la之厚度為例如〇·6〜1.2 mm。複製基板la 之材料係使用例如聚碳酸酯或環烯烴聚合物（例如ze〇ne X(註冊商標））等低吸水性樹脂。惟複製基板la也可使用例 如由鋁（A1)等金屬構成之基板，或玻璃基板，或由聚烯烴 、聚醯亞胺、聚醯胺、對苯基硫趟、聚對苯二曱酸乙二酯 等樹脂構成之基板。另方面在形成於複製基板^之一主面 的凹凸部上，則以沉積法形成有記錄膜或反射膜等，藉而 構成資訊信號部1 C。該資訊信號部1 c包括有反射膜、由光 磁材料構成之膜、由相變態（phase change)材料構成之膜、 或有機色素膜等。其中反射膜之材料係使用例如A丨合金等 。具體而言，目的製品之光碟若屬再生專用（R〇M(唯讀記 憶體））型之光碟，則資訊信號部lc應由至少具有例如由A1 I09875.doc -21 - 1279794 合金等構成之反射層的單層膜或積層膜構成。相對地目的 製品之光碟若屬可重寫型光碟，則資訊信號部1 C應由至少 具有由光磁材料構成之膜或由相變態材料構成之膜的單層 膜或積層膜構成，而若為補記型光碟，則應由至少具有例 如由有機色素材料構成之膜的單層膜或積層膜構成。 按依照該第1實施形態之碟片基板1，如第4圖所示係以 厚度為例如1.1 mm且呈圓盤狀之聚碳酸酯（pC)樹脂基板作 為複製基板la而使用，並使該複製基板la之直徑（外徑）設 定成例如120 mm，使中心孔lb之開口徑（内口徑）設定成例 如15 mm者。並且在反射層丨丨上依序積層有第一電介體層 12、記錄層13、第二電介體層丨4、以及反應防止層15，藉 而構成資訊信號部1 c。 另方面如第5圖所示，作為光透射層2之膜片4，係包括 有光透射性膜片2a，與由被蓋在該光透射性膜片2a之一面 的壓敏性黏著劑（PSA)構成之黏合層2b。該膜片4係與在碟 片基板1之情況同樣地具有沖孔成平面圓環形狀之結構， 而在中央部則形成有穿通孔2c。關於該膜片4之尺寸，膜 片4之直控（外徑）係設定為與碟片基板1之外徑大致相同， 或比其為小，具體而言例如設定成120 mm，而穿通孔2c之 徑（内口梭）則設定為大於中心孔1 b之開口徑，且由夾住區 域3之最内周徑（例如23 mm徑）以下之範圍選擇，例如設定 為 23 mm。 如上述的膜片4之光透射性膜片2 a，係由例如至少具有 能符合可供透射記錄/再生用雷射光的光學特性要求之光 109875.doc -22- 1279794 透射性熱可塑性樹脂構成。該熱可塑性樹脂可選用耐熱尺 寸穩定性、熱膨脹係數、或吸濕膨脹係數等各值均接近於 複製基板la之該值的材料，具體而言可選用例如聚碳酸酯 (PC)或聚甲基丙烯酸甲酉旨（polymethylmethacrylate)等甲基 丙烯酸系樹脂（methacrylic resin)等。至於光透射性膜片2a 之厚度，較理想為選自50〜100 μπι範圍，更理想為選自 60〜80 μηι範圍。在該第1實施形態中，若考量光透射性膜 片2a係須經中介以由壓敏性黏著劑（PSA)構成之黏合層2b 而貼合於碟片基板1之一主面上，光透射性膜片2a之厚度 則應設定成例如70 μιη。另外該光透射性膜片2a之厚度， 應考量用以資訊信號之記錄/再生的雷射光之波長，或光 透射層2之所需要的膜厚而決定之。 另外用以構成黏合層之PSA為例如甲基丙烯酸系合成樹 月曰專。该黏合層2b之厚度為例如30 μιη，但是黏合層2b之 厚度或作為壓敏性黏著劑而使用之材料，則應考量光透射 層2之所需要的膜厚，或用以資訊信號之記錄/再生的雷射 光之波長而決定之。另外雖從略了圖示，但膜片4若處於 被保管之狀態則在該膜片4之黏合層2b之面貼上有供保護 其之保護膜。 接著’說明依如上述所構成碟片基板1與膜片4之貼合方 法。 首先，就用以貼合該碟片基板丨與膜片4之貼合裝置說明 如下。於第6圖顯示在該第丨實施形態使用之貼合裝置。 如第6圖所示，該第i實施形態之貼合裝置係將固定台21 109875.doc -23- 1279794 與可動台22設在相對的位置而構成。 固定台21係構成為可供擺放膜片4。即在固定台21之相 對於可動台22的部分，設有相對於固定台21而突出及可朝 會埋沒之方向移動之上下動銷23。該上下動銷23之徑係構 成為與上述膜片4之穿通孔2c的徑相同。並且構成為可邊 使膜片4之穿通孔2c嵌合於上下動銷23下邊使膜片4擺放於 固定台21上。另在該上下動銷23之上部設有突出成圓柱狀 的基板定位銷24。該基板定位銷24之徑係構成為大致與上 述碟片基板1的中心孔lb之徑相同，並構成為可在邊對準 碟片基板1之中心下邊以上下動銷23支撐該碟片基板1。如 上述所構成固定台21，可供膜片4嵌合於上下動銷23而擺 放’且可供在邊使碟片基板1後合於基板定位銷24下邊以 上下動銷23之段差部分來加以支撐。 另在可動台22之相對於固定台21的部分之面上，設有例 如由橡膠等彈性體構成之墊25。該墊具有圓錐形狀，其圓 錐形狀之平面側係固定在可動台22之相對於固定台21之面。 使用依照如上述構成之第1實施形態的貼合裝置而實施 碟片基板1與膜片4之貼合時，則首先將膜片4，以其穿通 孔2c嵌合於上下動銷23而擺放於固定台21上。此時應使膜 片4擺放成使其黏合層2b側之面相對於可動台22。然後將 碟片基板1 ’以其中心孔1 b嵌合於基板定位銷24而擺放於 上下動銷23之段差部分。此時應使碟片基板1以其設有資 訊信號部的資訊信號部1c之面，相對於黏合層21)之黏接面 而支撐在上下動銷23。 109875.doc -24- 1279794 /接著使可動台22向固定台21移動（第6圖中之下方”然 後以墊25先按壓基板定位銷24，接著介以碟片基板丨而使 I動銷23進入固定台21中。藉此，碟片基板1與膜片4之 1隙就逐漸地變小，最後碟片基板i與膜片4就被壓接，使 貝Λ L 5虎部ic之面與黏合層沘相黏接。該壓接經趨於穩定 後，使可動台22朝由固定台21離遠之方向開放。之後，則 使用特定的搬送裝置（未圖示），從固定台21搬出經壓接的 > 碟片基板1與膜片4。 經由上述過程，即可使碟片基板1與膜片4相貼合而製得 在碟片基板1的資訊信號部lc之面上設有光透射層2之光碟。 關於如上述所製得之光碟，本發明人曾製造各種不同反 應防止層15膜厚之碟片基板丨而進行碟片基板彼此間之比 較檢討。具體而言複製基板la係使用厚度為Kl 且呈平 面圓環形狀之聚碳酸酯（pc)基板，資訊信號部丨c則使用： 在膜厚為100 nm以上之A1合金所構成之反射層丨丨上，將由 膜厚為18 nm之ZnS與Si〇2之混合物（ZnS_Si〇2)構成之第一 電介體層12、由膜厚為24 nm之GelnSbTe合金層構成之記 錄層13、由ZnS-Si〇2構成之第二電介體層14、以及由電介 體構成之反應防止層15,依序積層而成之積層膜。 其中’在上述資訊信號部lc中由ZnS-Si〇2所構成第二電 介體層14之電介體層14的膜厚，係以能使其鏡部分的反射 率成為1 5%以上之方式而設定。就是說通常對於供使用於 光碟之資訊信號的記錄/再生之群而言，乃需要丨〇%以上之 反射率。該群之反射率為平坦的鏡部之反射率的7〇%左右 109875.doc -25- 1279794 。因此如欲在群中獲得良好的記錄/再生特性，在鏡部之 反射率則需要確保15%以上之反射率。這樣的考量下，本 發明人就加以測試反射率之第二電介體層（ZnS_Si〇2)膜厚 依存性。其結果顯示於第7圖。如第7圖所示，本發明人發 現反射率會隨著第二電介體層14之膜厚增加而以正弦波形 態而變化。因此該第二電介體層14之膜厚，理應選自該以 正弦波形態變化之反射率會達到15%以上之範圍，具體而 言應選自45 nm〜90 nm範圍内，或130 nm〜175 nm範圍内。 按在本第1實施形態中則選擇丨4〇 nm。 至於上述資訊信號部丨c中的反應防止層丨5之材料，則以 如下述方式決定之。即如上述，在該資訊信號部1c之上層 ,光透射性膜片2a係介以由壓敏性黏著劑（pSA)構成之黏 合層2b而貼合在其上。因此作為構成該資訊信號部卜的最 表層之反應防止層15，其材料應選用不會與該黏合層孔起 化學反應之材料，具體而言應選用例如氮化矽化合物。按 在本第1實施形態中則以叫队構成反應防止層15。 從此以下，設像這樣的以卟^構成之反應防止層15作 為資訊信號部lc之最表層所構成依照本第1實施形態之碟 片基板1為實施例之碟片基板1。並設將該反應防止層15之 膜厚設定為1 nm者為第1之實施例的碟片基板1，設定為 2 nm者為第2之實施例的碟片基板丨，設定為$ nm者為第3 之實施例的碟片基板1 ,設定為10 nm者為第4之實施例的 碟片基板1 ’設定為3〇 11111者則為第5之實施例的碟片基板1。 另方面’供比較的碟片基板1，具體而言其係以厚度為 109875.doc -26- 1279794 呈圓柱狀的PC基板作為複製基板1 a，並使該 土板之直仏（外徑）没定為例如1 2 〇 mm，使中心孔1 b之開口 拴（内口敉）叹定為例如i 5瓜瓜者。另外該傳統碟片基板1之 "貝Λ仏唬邛1 c，係由在膜厚為i 〇〇 之鋁合金構成之反射 曰上依序積層有由膜厚為18 ^爪之ZnS_si〇2構成之第一電 介體層，由膜厚為24 nmiGeInSbTe合金層構成之相變態 屺錄層，以及由膜厚為14〇 nm2ZnS_si〇2構成之第二電介 體層而成之積層膜構成。亦即，以未設有反應防止層此 碟片基板，作為比較例之碟片基板i。 然後對於經由使用該第i〜第5之實施例的碟片基板工並依 照上述貼合方法所製得光碟，與使用比較例之碟片基板i 並依照上述製造方法所製得光碟，分別實施反射率變化率 之測試。其過程如下。首先對於經由使用第i〜第5之實施 例及比較例之碟片基板所製得各光碟，施加初始晶化處理 ，藉以使資訊信號部卜之記錄層13由非結晶質狀態變成為 結晶狀態。接著，經測試初始反射率後，放入於溫度 8〇°C、濕度85%之恒溫恒濕槽内為時1〇〇〇小時，以進行加 速試驗。之後則對於由恒溫恒濕槽取出之各碟片實施反射 率測試，並且測試該加速試驗前後的反射率之變化。此外 該反射率之測試，係使用波長為彻nm，數值孔徑财為 〇·85之光學系統評估裝置而對於光碟之無凹凸部分，所謂 的鏡部分而實施。反射率變化率就是將由初始反射率做加 速試驗後之反射率的減法運算所得之反射率變化量，除以 初始反射率而得之商值。兹將該反射率變化率之測試結果 109875.doc -27- 1279794 顯示於下列表i。 [表1] 比較例 第1之 實施例 第2之 實施例 第3之 實施例 第4之 實施例 第5之 實施例 Si3N4 膜厚[nm] 0 1 2 5 10 30 初始反射率[%] 20.0 20.1 20.7 21.2 21.6 18.0 加速試驗後反射[%] 14.3 17.2 18.8 19.9 20.8 17.8 反射率變化量[%] 5.7 2.9 1.9 1.3 0.8 0.2 反射率變化量 初始反射率 0.285 0.144 0.092 0.061 0.037 0.011 由表1即可知··經使用第1〜第5之實施例的碟片基板1所 製付之光碟（第1之實施例的光碟〜第5之實施例的光碟）， 經由加速試驗結果其初始反射率之反射率變化量（反射率 變化率）為0.011〜〇_ 144，與此相對，經使用比較例之碟片 基板1所製得之光碟（比較例之光碟），經由加速試驗結果其 反射率麦化率會兩達約為第1之實施例的反射率變化率的 兩倍之0·285，且在該比較例之光碟亦可觀測到呈黃色的 變色。依照本發明人經由實驗所得的見解，在該黏合層孔 的呈黃色之變色乃是造成反射率下降之原因。因而在資訊 信號部lc之與黏合層孔的界面設置反應防止層15便可防止 反射率退化。 另方面，由表丨即可知下述關於第丨〜第5之實施例的光碟 彼此間之關係。即由Si#4所構成反應防止層15之膜厚 為1 run的第1之實施例的光碟之反射率變化率為〇144，與 此相對’在膜厚為2 nm的光碟之反射率變化率卻為〇映 109875.doc -28 - 1279794 '由此即可知反射率變化率已有所下降。換言之，可知相 $ ;第1之貫轭例的光碟，在第2之實施例的光碟的反射率 认化已有所叉到抑制。同樣地相比較，即可知隨著使第3 T貫施例之光碟比起第2實施例之光碟、使第4之實施例的 2碟比起第3之實施例的光碟、使第5之實施例的光碟比起 第4之實施例的光碟而遞增反應防止層15之膜厚時，即可 使反射率變化率下降。另外依照本發明人觀察第i〜第5之 實加例的光碟，結果得知當設有反應防止層1 5時，黃色之 變色就會變少。 反應防止層15之膜厚 另外，一般而言若反射率變化率比01為大，則必定會 造成資訊信號之記錄/再生品質下降。因而由以3仏構成之 必須使其大於1 nm，較佳為大於2 nm。因此只要使反應防止層15之膜厚為2 nm以上，則可確 實地使反射率變化率成為0·1以下，而確保良好的記錄/再 生特性。 如上所陳，若依照本第1實施形態之光碟及其製造方法 則由於作為碟片基板1之主面的資訊信號部1 c之最表層 而設有由不致於在與黏合層2b之間產生化學反應之 所構成之反應防止層15，因此即使在長期使用之情況下， 也能防止在資訊信號部1()與黏合層孔間的黏合層孔之變色 (κ、憂），因而能抑制起因於變色之反射率下降，以及其所 造成之光碟退化。因此可製得具有薄型化、雙折射小、透 明性良好、且厚度也均自的光透射^，且可對應於物鏡之 南NA化，且具有良好的記錄再生特性之光碟。 109875.doc •29- 1279794 接著就依照本發明第2實施形態之光碟說明如下。依照 本第2實施形態之光碟，係與第丨實施形態不同而以氧化矽 (Si〇2)構成反應防止層15。 在此，该反應防止層15之材料，則以如下述方式決定之 。即如上述，在該資訊信號部lc之上層，光透射性膜片以 係須中介以由壓敏性黏著劑（PSA)構成之黏合層2b而貼合 在其上。因此作為構成該資訊信號部lc的最表層之反應防 止層15，其材料應選用不致與該黏合層21)起化學反應之材 料，具體而言應選用例如氮化矽化合物。按在本第2實施 形態中則以Si〇2構成反應防止層15。 從此以下，設像這樣的以由Si〇2構成之反應防止層15作 為1訊#號部1 c之最表層所構成依照第2實施形態之碟片 基板1為實施例之碟片基板i。並設由以〇2構成之反應防止 層15之膜厚設定為丨nm者為第6之實施例的碟片基板丨，設 疋為2 nm者為第7之實施例的碟片基板丨，設定為5 nm者為 第8之實施例的碟片基板！，設定為1〇 nm者為第9之實施例 的碟片基板1，没定為3 〇 nm者為第1 〇之實施例的碟片基板 1。另一方面，供比較之碟片基板i，係與第丨實施形態相 同’將此碟片基板1設為比較例之碟片基板1。 至於關於依照本第2實施形態的光碟之其他結構，仍與 第1實施形態者相同，故不加說明。另外關於光碟之製造 方法’亦與第1實施形態者相同，故不加說明。 並且對於經使用該第6〜第10之實施例的碟片基板1並依 照第1實施形態中所述貼合方法所形成光透射層之光碟， 109875.doc -30- 1279794 與使用比較例之碟片基板1並依照同樣的製造方法所形成 光透射層之光碟’分別實施反射率變化率測試。 其過程如下。首先對於經使用第6〜第10之實施例及比較 例之碟片基板所製得各光碟，施加初始晶化處理，藉以使 資訊信號部lc之記錄層13由非結晶質狀態變成為結晶狀態 。接著經測試初始反射率後，放入於溫度8〇°C、濕度85% 之恒溫恒濕槽内，為時1 〇〇〇小時而進行加速試驗。之後則 對於由恒溫恒濕槽取出之各碟片實施反射率測試，並測試 该加速試驗前後的反射率之變化。此外該反射率之測試， 係使用波長為400 nm，數值孔徑NA為0.85之光學系統評估 裝置而對於光碟之無凹凸部分，所謂的鏡部分實施。茲將 該反射率變化率之測試結果顯示於下列表2。 [表2] 比較例 第6之 實施例 第7之 實施例 第8之 實施例 第9之 實施例 第10之 實施例 Si〇2 膜厚[nm] 0 1 2 5 10 30 初始反射率[%] 20.0 20.1 20.6 21.1 21.3 18.4 加速試驗後反射率[%] 14.3 17.1 18.8 19.7 20.6 17.9 反射率變化量[%] 5.7 3.0 1.8 1.4 0.7 0.5 反射率變化量 初始反射率 0.285 0.149 0,087 0.066 0.033 0.027 由表2即可知：在經使用第6〜第1〇之實施例的碟片基板1 所製得之各光碟（第6之實施例的光碟〜第10之實施例的光 碟），經由加速試驗結果其相對於初始反射率之反射率變 109875.doc -31 - 1279794 化量（反射率變化率）為〇 〇27〜〇149，與此_，在經使用 車Ή之碟片基板1所製得之光碟（比較例之光碟），經由加 速試驗結果其反射率變化率會高達約為第6之實施例的反 射率變化率的兩倍之G.285，且如在第1實施形態所述，在 亥比#又例之光碟則可在黏合層2b觀測到呈黃色的變色，這 就是造成反射率下降之原因。因而在資訊信號部之與黏 合層2b的界面設置不致與黏合層孔起反應之由“ο〗構成之 反應防止層1 5便可防止反射率退化。 另方面，由表2即可知下述關於第6〜第1〇之實施例的光 碟彼此間之關係。即由Si〇2所構成反應防止層工$之膜厚為 的第6之實^例的光碟之反射率變化率為〇·ι49，與此 相對，在膜厚為2 nm的第7之實施例的光碟之反射率變化 率卻為0.087，由此即可知反射率變化率已有所下降。換 :之可知相對於第6之實施例的光碟，在第7之實施例的 光碟之反射率退化已有所受到抑制。同樣地相比較，隨著 使第8之實施例的光碟比起第7之實施例的光碟、使第9之 實施例的光碟比起第8之實施例的光碟、使第1〇之實施例 的光碟比起第9之實施例的光碟而遞增反應防止層丨5之膜 厚時，即可使反射帛變化率逐漸下$。另夕卜依照本發明人 觀察第6〜第1〇之實施例的光碟，結果得以確認當設有反應 防止層1 5時黃色之變色就會變少。 再者，一般而言若反射率變化率比〇·丨為大，則必定會 造成資訊信號之記錄/再生品質下降。因而由Si〇2構成之反 應防止層15之膜厚，至少須使其大於j nm，較佳為大於2 109875.doc -32- 1279794 nm。因此只要使反應防止層15之膜厚為2_以上，則可確 實地使反射率變化率成為(M以下，而確保良好的記錄/再 生特性。 若依照本第2實施形態之光碟及其製造方法，則由於作 為碟片基板1之主面的資訊信號部lc之最表層而設有由不 致於在與黏合層2b之間產生化學反應之由以〇2構成之反應 防止層15，因而可獲得與第丨實施形態相同之效果。 接著，就依照本發明第3實施形態之光碟說明如下。於 第8圖顯示依照本第3實施形態之光碟。 如第8圖所示，該依照本發明第3實施形態之光碟，係與 第1實施形態之情況下不同而以覆蓋資訊信號部1〇之方式 設有由紫外線硬化樹脂構成之反應防止樹脂層31，並且在 忒反應防止樹脂層3 1之表面介以黏合層2b而貼合有光透射 性膜片2a，藉以構成光碟。 依照本第3實施形態之資訊信號部1〇，如第9圖所示，係 與第1及第2實施形態之資訊信號部lc不同而未設有反應防 止層15。依照本第3實施形態之碟片基板1係在全面設有反 應防止樹脂層31。另外與第1實施形態之情況同樣地，設 未设有反應防止樹脂層3 1之碟片基板1為比較例之碟片基 板1 〇 接著，就依照本第3實施形態之光碟之製造方法說明如 下。首先在形成在與第1實施形態相同的複製基板u之一 主面的凹凸部上，以沉積法形成有記錄膜或反射膜等，藉 而形成有資訊信號部1 c。 109875.doc -33- 1279794 依照本第3實施形態之碟片基板1，具體而言其係如第9 圖所示，複製基板1 a係使用例如厚度為1 · 1 mm且呈圓盤狀 之聚碳酸酯（PC)基板，並使該PC基板之直徑（外徑）設成為 例如120 mm，中心孔lb之開口徑（内口徑）設成為15 111111者 。資訊h號部1 c則使用：在膜厚為1 〇 〇 nm之A1合金所構成 之反射層11上，將由膜厚為18 nm之ZnS與Si〇2的混合物構 成之第一電介體層12，由膜厚為24 nm之GeSbTe合金層構 成之可相變態記錄的記錄層13，以及由硫化鋅（ZriS)與氧 化石夕（Si〇2)的混合物（ZnS_Si02)構成之第二電介體層14, 依序積層而成之積層膜。其中，該由ZnS-Si02所構成第二 電介體層14之膜厚，係與第丨實施形態之情況同樣地使其 鏡部分的反射率設定為15%以上，具體而言係設定在 45〜90 nm範圍内，或130〜175 nm範圍内，在本第3實施形 態則設定為140 run。 至於關於膜片4方面，由於其係與第1及第2實施形態之 情形相同，因此不加說明。 接著’就如上所構成依照本第3實施形態之反應防止樹 脂層31之形成方法說明如下。於第1〇至第12圖顯示依照本 第3實施形態之反應防止樹脂層3丨之形成方法。 首先如第10圖所示，在碟片基板1之形成有資訊信號部 lc之一主面上，供應紫外線硬化樹脂32而塗敷。紫外線硬 化樹脂32之供應，係由紫外線硬化樹脂供應部33之嘴口向 碟片基板1之内周側以能使其成為平面圓環形狀之方式而 進行。 I09875.doc -34- 1279794 接著如第u圖所示，以裝置之旋轉轴（未圖示）為中心 而使塗敷有紫外線硬化樹脂32之碟片基板工向面内方向（第 圖中則碩才示5己Μ方向）旋轉。藉此即可使紫外線硬化樹脂 32遍布於碟片基板丨之表面。多餘的紫外線硬化樹脂w會 亥面内方向之旋轉而甩開，並以覆蓋複製基板h的資訊 L # M e之狀悲均句塗敷在其上’藉此即可形成出厚度均 勻的膜Λ時由甩開後之紫外線硬化樹脂32構成的膜之膜 厚’可以旋轉數加以調整。 」後如第12圖所不，使塗敷有紫外線硬化樹月印之複製 基板U擺置於構成為可發光且可照射紫外線的紫外線光源 34之,、、、射範圍内。此時複製基板“ ’應擺放成使其塗敷有 紫外線硬化樹脂32之—侧相對於紫外線光源34之設置側。 之後則由紫外線光源34對於複製基板u之一主面上的紫外 線硬㈣脂32照射紫外線。此時之累積強度應為例如· mJ/cm2。經照射紫外線，紫外線硬化樹脂32即將在複製基 板h上以覆蓋資訊信號部1〇之狀態下而硬化，形成反應防 止樹脂層31，藉此即可製得依照本第3實施形態之碟片基 板1 0 關於如上述製造方法所製得碟片基板丨，本發明人曾在 各種不同製造條件下形成了反應防止樹脂層31。設形成有 該反應防止樹脂層31之碟片基板1為實施例之碟片基板。 首先，使用未含有溶劑且黏度為4 〇 χ 1〇·2 pa · s (4〇 cps)之樹脂作為供塗布的紫外線硬化樹脂32而在複製基板 la上形成反應防止樹脂層31，藉以製造碟片基板丨。製造 109875.doc -35- 1279794 時’則將該無溶劑型樹脂供應於複製基板ia的半㈣ ，位置：並以旋轉轴為中⑽讓3s•丨（5_rpm)之旋轉" 文下使複製基板1a旋轉。設在該旋轉數下之旋轉時間設定 為1s(秒鐘）所製得之碟片基板為依照第11實施例之碟片基 板1 ’設定為2s時為依照第12實施例之碟片基板i，設定： 4S時為依照第13實施例之碟片基板卜設定為〜時作為依 照第14實施例之碟片基板卜妓為⑽時為依照第15實施 例之碟片基板1 ’設定為20s時則為依照第16實施例之碟片 基板1。 乂 3有50重篁〇/〇之甲氧基丙醇（meth〇xy^〇pan〇1) 且黏度為LGx1(rlpa· s (1G⑽之溶劑型樹脂作為供塗敷 的紫外線硬化樹脂32而在複製基板la上形成反應防止樹脂 層31，放置30秒鐘，使溶劑完全釋放後以紫外線照射使其 硬化而製造碟片基板i。將該溶劑型樹脂供應於複製基板 la的半徑17 mm之位置，並以旋轉軸為中心而以83 3 一 (5000 rpm)之旋轉數下使複製基板^旋轉。設以經在該旋 轉數下使旋轉時間設定為ls所製得之碟片基板為依照第Η 之實施例的碟片基板丨，設定為2s時為依照第18之實施例 之碟片基板1，設定為4s時為依照第19之實施例的碟片基 板1，設定為7s時為依照第20之實施例的碟片基板i，設定 為l〇s時為依照第21之實施例的碟片基板丨，設定為2〇s時 為依照第22之實施例的碟片基板j。 茲將在使用上述無溶劑型紫外線硬化樹脂32所製造依照 第11〜第16之實施例的碟片基板丨之反應防止樹脂層31膜厚 109875.doc -36- 1279794 特丨生*即在碟片基板1之資料區域的反應防止樹脂層3 1之 平勻膜厚在 > 料區域内周（半徑24 mm)的反應防止樹脂 層31之膜厚、在資料區域外周（半徑58㈤㈣的反應防止樹 脂層31之膜厚、以及膜厚之内外周膜厚差之測試結果顯示 於下列表3。另將在使用含有溶劑的紫外線硬化樹脂”所 製造依照第17〜第22之實施例的碟片基板i中反應防止樹脂 層31之與上述相同之膜厚特性測試結果顯示於下列表4。 [表3] 第11之 實施例 第12之 實施例 第13之 實施例 第14之 實施例 第15之 實施例 第16之 實施例 旋轉時間[S] 1 2 4 7 10 20 平均膜厚[μηι] 7.6 5.8 4.3 3.0 2.7 1.9 内外周膜厚差[μιη] 2.3 1.8 1.3 1.0 0.8 0.6 [表4] 第17之 實施例 第18之 實施例 第19之 實施例 第20之 實施例 第21之 實施例 第22之 實施例 旋轉時間[S] 1 2 4 7 10 20 平均膜厚[μιη] 2.9 2.2 2.0 1.8 1.7 1.6 内外周膜厚差Qxm] 0.4 0.3 0.2 0.2 0.1 0.1 由表3即可知：經以使用無溶劑型之紫外線硬化樹脂32之旋 塗法而形成反應防止樹脂層3 1時，其平均膜厚及内外周膜厚 差會隨著旋轉時間增加而減少。另外經以使用含有溶劑的紫 外線硬化樹脂3 2之旋塗法形成反應防止樹脂層3 1時，其平均 膜厚會隨著旋轉時間之增加而減少同時内外周膜厚差會比表3 109875.doc -37- 1279794 中依照第11〜第16之實施例的碟片基板1變得非常大。-般而 言以旋塗法形成紫外線硬化樹脂時，外周部之膜厚會比内周 部之膜厚為大^這些即可知紫外線硬化樹脂32較佳為使用 含有溶劑之樹脂，而使用該含有溶劑之紫外線硬化樹脂即可 使 > 料區域内周側的膜厚差作成為1 μιη以下。 如上述，經形成反應防止樹脂層3丨後，使用與第^實施形態 之情形相同的貼合裝置而貼合形成有該反應防止樹脂層3丨的 碟片基板1，與第1實施形態之情形相同的膜片4，即能製得依 照第3實施形態之光碟。 本發明人曾對於在依照上述第U〜第22之實施例的碟片基板 1之反應防止樹脂層3 1表面貼合膜片4所形成之各光碟（依照第 Η〜22之實施例的光碟），實施與第i實施形態之情形同樣的初 始反射率及加速試驗後之反射率測試而求出反射率之變化率 。至於比較例之光碟則與第1實施形態之情形者相同。測試結 果顯示於下列表5及表6。 [表5] 比較例 第11之 實施例 第12之 實施例 第13之 實施例 第14之 實施例 第15之 實施例 第16之 實施例 反應防止樹脂層膜[μιη] 0 7.6 5.8 4.3 3.0 2.7 1.9 初始反射率[%] 20.0 18.8 18.9 19.1 19.3 19.5 19.5 加速試驗後反射率[%] 14.3 18.5 18.5 18.6 18.7 18。9 18.8 反射率變化量[°/〇] 5.7 0.3 0.4 .0.5 0.5 0.6 0.7 反射率變化量 初始反射率 0.285 0.016 0.021 0.026 0.026 0.031 0.036 109875.doc -38- 1279794 [表6] 比較例 第17之 實施例 第18之 實施例 第19之 實施例 第20之 實施例 第21之 實施例 第22之 實施例 反應防止樹脂層膜[μπχ] 0 2.9 2.2 2.0 1.8 1.7 1.6 初始反射率[%] 20.0 19.3 19.3 19.4 19.5 19.5 19.6 加速試驗後反射率[%] 14.3 18.8 18.8 18.8 18.9 18.8 18.8 反射率變化量[°/〇] 5.7 0.5 0.5 0.6 0.6 0.7 0.8 反射率變化量 初始反射率 0.285 0.026 0.026 0.031 0.031 0.036 0.041 由表5即可知相對於比較例之光碟的反射率變化率會高達如 0 · 2 8 5之鉅，在依照第11〜16之實施例的光碟，卻只要形成有 反應防止樹脂層3 1，即可使反射率變化率降低。另在比較例 之光碟中雖能觀察到會呈黃色之變色即所謂的黃變，但在依 照第11〜16之實施例的光碟中，黏合層2b之變色卻非常少而呈 透明。 另亦可知’一般而言反射率變化率比〇 · 1為大時，雖會造成 資訊信號之記錄/再生品質下降，但在依照第"〜“之實施例 的光碟，即使在反應防止樹脂層31之膜厚為如19 μιη之最小 的依照第16之實施例的光碟，其反射率變化率卻只有如〇〇36 之小。由此即可知只要形成有反應防止樹脂層31，即可確實 地使反射率變化率成為〇·!以下，而確保良好的記錄/再生特性。 另外，由表6即可知相對於比較例光碟之反射率變化率為會 高達如0.285之矩，在依照第17〜22之實施例的光碟，只要形 成有反應防止樹脂層31，即可使反射率變化率降低。另在比 較例之光碟中雖能觀察到會呈黃色之變色即所謂的黃變，但 在依照第17〜22之實施例的光碟中，黏合層孔之變色卻非常少 109875.doc -39- 1279794 而呈透明。 在依照第17〜22之實施例的光碟，即使在反應防止樹脂層3 1 之膜厚為如1·6 μπΐ2最小的依照第22之實施例的光碟，其反 射率變化率卻只有0.041之小。由此即可知只要形成有反應防 止樹脂層3 1，即可確實地使反射率變化率成為〇 · 1以下，而確 保良好的記錄/再生特性。 若依照本發明第3實施形態之光碟，則由於在複製基板丨&上 以覆蓋資訊信號部1 c之方式，塗布紫外線硬化樹脂並使其硬 化而形成反應防止樹脂層3 1，且構成為介以該反應防止樹脂 層3 1而設置光透射層2，因而能獲得與第1實施形態之情況相 同之效果。 另在製造該依照第3貫施形態之光碟時，由於以旋塗法塗布 紫外線硬化樹脂32而製造反應防止樹脂層3丨時使用含有溶劑 之焦外線硬化樹脂’即能形成出資料區域之内外周膜厚差少 的光透射層，因而能製造確保有良好的記錄/再生特性之光碟。 以上所揭示者，乃本發明之具體實施形態，但本發明並非 侷限於上述實施形態，當可源於本發明之技術思想而作各種 變形。 例如，在上述實施形態中所舉之數值、材料、光碟結構， 僅為本發明之一可取例子，必要時當亦可使用與此互異之數 值、材料、光碟結構。 另外在上述實施形態中，則將本發明適用於具有光透射層 的光碟之情況加以說明，惟本發明也可適用於採用光磁記錄 再生之光硬碟、或可拆式光硬碟。此外在上述第i實施形態中 109875.doc -40- 1279794 ，則將本發明適用於利用相轉變而執行資訊信號記錄之相變 悲型光碟上，但本發明也可適用於其他之可重寫型光碟、補 記型光碟、或再生專用型光碟。 另外也可先製備兩片依照上述實施形態之光碟，然後使這 些兩片光碟使其與設有光透射層2的一側成相反側之面相對而 貼合，藉此即可製造雙面記錄型之光碟。 另外上述第1實施形態，係就將資訊信號部形成在基板之例 子加以δ兒明，但該資訊信號部也可採取使其形成在膜片之與 基板的相對面之方式。更進一步也可採取以複數片之薄膜構 成膜片而在其最外層之膜片形成凹凸而形成資訊信號部之方 如上所陳，若依照本發明，則由於在資訊信號部之黏合 層側。又有反應防止層，能抑制設在基板一主面上的資訊信號 部與黏合層之界面，用以構成資訊信號部最表面的層，與光 透射層之黏合層間的反應，因而在基板之一主面上介以黏合 層而貼合光透射性膜片所構成之光碟中，能抑制這些各光碟 間之反射率不穩定性，或在該光碟之記錄/再生面的反射率 變動，且不但能製得可對應於進行記錄/再生時所使用物鏡 之高ΝΑ化，雙折射小、透明性佳且具有均勻膜厚的光透射 層之光碟，同時也能提高製品良率。 【圖式簡單說明】 圖1係顯示依照傳統技術之用以貼合碟片基板與膜片的貼合 裝置之模式圖。 圖2係顯示依照本發明第！實施形態的光碟之剖面圖。 109875.doc -41 - 1279794 圖3係顯示依照本發明第i實施形態的碟 图45基板之剖面圖。 "係·、、、員不依照本發明第i實施形態的碑 之詳細剖面圖。 ㉟片基板資訊信號部 圖5係顯示供形成依照本發明第【實施形態的光透射層的膜 片之剖面圖。 曰 、 圖6係顯示依照本發明第β施形態之用以貼合碟 膜片的貼合裝置之模式圖。 … 圖7係顯示依照本發明第1實施形態的光碟鏡部反射率之第 二電介體層膜厚依存性圖表。 圖8係顯示依照本發明第3實施形態的光碟之剖面圖。 圖9係顯示依照本發明第3實施形態的碟片基板之剖面圖。 圖1〇係顯示用以說明依照本發明第3實施形態的反應防止層 形成方法之模式圖。 圖11係顯示用以說明依照本發明第3實施形態的反應防止層 形成方法之模式圖。 圖12係顯示用以說明依照本發明第3實施形態的反應防止層 形成方法之模式圖。 【主要元件符號說明】 1 碟片基板 1 a 複製基板 lb 中心孔 1 c 資訊信號部 2 光透射層 2a 光透射性膜片 109875.doc -42- 1279794 2b 黏合層 2c 穿通孔 3 爽住區域 3a 夾住基準面 4 膜片 11 反射層 12 第一電介體層 13 記錄層 14 第二電介體層 15 反應防止層 21 固定台 22 可動台U2)), carbon carbide (SiC), zinc sulfide (ZnS), sulfidation (pbs), Ge-N, Ge_N-0, Si-N-0, calcium fluoride (CaF), lanthanum fluoride (LaF) , magnesium fluoride (MgFd, sodium fluoride (NaF), titanium fluoride (TiF4), etc. In addition, materials using these materials as a main component, or a mixture of these materials, such as A1N-SiO 2 〇 in the present invention, may also be used. A typical ruthenium substrate has a planar circular ring shape, and the light transmissive film also has a planar circular ring shape. In the present invention, in order to form a light transmissive layer having a light transmissive film, it is punched into a planar annular shape. One side of the diaphragm is provided with an adhesive layer, and the substrate and the film are bonded to each other via the adhesive layer, thereby forming a light transmitting layer on the substrate. In the present invention, it is typically a planar annular shape. The inner diameter of the diaphragm is configured to be greater than 109875. Doc -17, 1279794 The inner diameter of the planar annular shaped substrate, and the outer diameter of the film having the planar annular shape is configured to be smaller than the outer diameter of the substrate having the planar annular shape. It is typical in the present invention that the adhesive layer is composed of a pressure sensitive adhesive (PSA). In the present invention, in order to minimize the warpage or deformation of the manufactured optical disk, the light transmissive enamel film is preferably made of the same type of material as the material used for the substrate. Further, the thickness of the light-transmitting film is typically thinner than the thickness of the substrate, and specifically, may be selected from the range of 3 μm to 150 μm. Further, in the present invention, the disc substrate is made of a low water-absorbent resin such as polycarbonate (PC) or a cycloolefin polymer, and the light transmissive film is preferably made of a disc. The sheet substrate is made of the same material. Further, the material usable for the substrate is, for example, a substrate made of a metal such as aluminum (A1), or a glass substrate, or a polyolefin (polyole Hne), a polyimides, or a p〇lyamide. A substrate made of a resin such as phenyl sulfide or polyethylene terephthalate (PET). Further, the light-transmitting film ‘ is typically composed of a polycarbonate resin, but may be composed of other resin materials. In the present invention, in order to prevent the light-transmitting film from being present on the surface on which the film is applied to the bonding device for bonding the disk substrate and the film, foreign matter is not present. The foreign matter is injured or a concave portion is formed. Preferably, the diaphragm is preferably composed of a light transmissive film, an adhesive layer, and a protective layer for protecting the light transmissive film. The protective layer is provided on the side opposite to the side on which the adhesive layer of the light-transmitting film is provided. This protective layer is more than i09875. Doc -18 - 1279794 is desirably composed of a polyethylene terephthalate (PET) film or a polyethylene naphthalate (pEN) film. Specifically, at least one surface of the protective film such as the PET film or the PEN film is covered with a second adhesive, and the surface covered with the second adhesive is adhered to one side of the light-transmitting film. Thereby forming a film for bonding to the disc substrate. In the present invention, a light transmissive film is typically used by a GaN-based semiconductor laser (emission wavelength: 4 〇〇 nm, blue light emission), ZnSe, for recording/reproduction of at least two signals. A non-magnetic material that transmits laser light such as a semiconductor laser (emission wavelength: 5 〇〇 nm, green light) or an AlGalnP semiconductor laser (light emission wavelength of about 635 to 680 nm, red light) In other words, it is composed of a thermoplastic resin having a light transmissive property such as polycarbonate S. The present invention can be applied to a disc having a thin light transmitting layer such as a DVR (Digital Video Recording System), such as a so-called DVR-red configured to record or reproduce an information signal with a semiconductor laser having an emission wavelength of about 650 nm. Or a so-called DVR-blue optical disc in which information signals are recorded or reproduced by a semiconductor laser having an emission wavelength of about 400 nm. Preferably, the DVR is configured to increase the NA to 0 by combining two lenses in series. An objective lens of about 85 records the information signal, specifically, it has a recording capacity of about 22 GB on one side. Further, the optical disk to which the present invention is applied is a disk housed in a cartridge such as the above-described DVR, but the object to which the present invention is applied is not limited to those accommodated in the film cassette. According to the optical disc and the method of manufacturing the same according to the present invention as described above, at least the light transmissive film is used to bond the light transmissive film 109875. Doc -19· 1279794 The light transmissive layer is formed on the adhesive layer on the main surface of the substrate, and the reaction preventing layer forms a layer which is in contact with the surface of the adhesive layer of the information signal portion, thereby preventing the adhesive layer and the dielectric constituting the information signal portion. Chemical reaction between layers. [Embodiment] An embodiment of the present invention will be described below with reference to the drawings. In all the figures of the following embodiments, the same component symbols are attached to the same or corresponding parts. First, a compact disc according to a first embodiment of the present invention will be described. Fig. 2 shows an optical disc according to a first embodiment of the present invention. As shown in Fig. 2, in the optical disk according to the first embodiment of the present invention, the disk substrate 1 is formed with a center hole ^ at the center portion of the replica substrate 1a, and is formed on one main surface of the unevenness. There is an information signal unit lc. Further, a light transmitting layer 2 is provided on the disc substrate 1. The light-transmitting layer 2 is formed by bonding the light-transmitting film 2a to the adhesive layer 2b, and the center portion thereof is provided with a through-hole 2c and a punch-through of the light transmissive film 2a side of the light-transmitting layer 2 The hole is surrounded by a 'cramp' region 3 and is set in an annular shape. The innermost circumference of the annular sandwiching region 3 is, for example, 23 mm, and the outermost peripheral diameter is, for example, 33 mm. In the light transmitting film 2& side main surface of the light transmitting layer 2 in the child holding area 3, there is no clamping of the reference surface 3a, and the optical disk is clamped or placed on the rotating shaft of the recording and reproducing device (all are not In the case of the above, if the light transmissive film 2a is bonded to one of the main faces of the disc substrate 1 by means of the adhesive layer 2b, the diameter of the through hole 2c must be set larger than The diameter ' of the center hole of the disc substrate 1 is set to, for example, 15 mm or more. In addition, if you consider clamping the reference surface 3a 109875. Doc -20- 1279794 must be formed by the main surface of the light-transmitting film 2a of the light transmitting layer 2, and the diameter of the through-hole 2c must be set to be equal to or less than the innermost diameter of the sandwiching region 3, specifically, for example, Below 23 mm. Next, a method of manufacturing an optical disk according to the first embodiment configured as described above will be described. Fig. 3 shows a disc substrate serving as a support for the optical disc. The disc substrate is shown in Fig. 4 as a reverse structure, and the film for attaching to the disc substrate is shown in Fig. 5. According to the optical disk manufacturing method of the first embodiment, as shown in Fig. 3, the disk substrate 供 for forming the light transmitting layer is first prepared. In the disc substrate i, a center hole lb is formed in a central portion of the replica substrate 1a, and an information signal portion 1c is provided on one main surface on which the unevenness is formed. The replica substrate 1a is produced by an injection molding method using a specific punch. The thickness of the replica substrate la is, for example, 〇·6~1. 2 mm. As the material for replicating the substrate la, a low water-absorbent resin such as polycarbonate or a cycloolefin polymer (for example, ze〇ne X (registered trademark)) is used. However, the substrate la may be a substrate made of a metal such as aluminum (A1), or a glass substrate, or a polyolefin, a polyimide, a polyamide, a p-phenyl sulfonium, or a polyethylene terephthalate. A substrate made of a resin such as a diester. On the other hand, on the uneven portion formed on one main surface of the replica substrate, a recording film, a reflection film, or the like is formed by a deposition method, thereby constituting the information signal portion 1 C. The information signal portion 1c includes a reflective film, a film made of a magneto-optical material, a film made of a phase change material, or an organic dye film. The material of the reflective film is, for example, an A bismuth alloy or the like. Specifically, if the optical disc of the destination product is a reproduction-only (R〇M (read only memory) type) optical disc, the information signal portion lc should have at least, for example, A1 I09875. Doc -21 - 1279794 A single layer film or laminated film of a reflective layer made of an alloy or the like. If the optical disk of the target product is a rewritable optical disk, the information signal portion 1 C should be composed of a single film or a laminated film having at least a film made of a photomagnetic material or a film composed of a phase change material. In the case of a supplementary type optical disc, it should be composed of a single layer film or a laminated film having at least a film made of, for example, an organic pigment material. According to the disc substrate 1 according to the first embodiment, as shown in Fig. 4, the thickness is, for example, 1. A 1 mm disk-shaped polycarbonate (pC) resin substrate is used as the replica substrate 1a, and the diameter (outer diameter) of the replica substrate 1a is set to, for example, 120 mm, so that the opening diameter of the center hole lb is The caliber is set to, for example, 15 mm. Further, a first dielectric layer 12, a recording layer 13, a second dielectric layer 4, and a reaction preventing layer 15 are sequentially laminated on the reflective layer, thereby constituting the information signal portion 1c. On the other hand, as shown in Fig. 5, the diaphragm 4 as the light transmitting layer 2 includes a light transmissive film 2a and a pressure sensitive adhesive which is covered on one side of the light transmissive film 2a ( PSA) constitutes the adhesive layer 2b. The diaphragm 4 has a structure in which a punched hole has a planar annular shape as in the case of the disk substrate 1, and a through hole 2c is formed in the center portion. Regarding the size of the diaphragm 4, the direct control (outer diameter) of the diaphragm 4 is set to be substantially the same as or smaller than the outer diameter of the disc substrate 1, specifically, for example, 120 mm, and the through hole The diameter of 2c (inner mouth shuttle) is set to be larger than the opening diameter of the center hole 1 b, and is selected from the range of the innermost diameter (for example, 23 mm diameter) of the sandwiching region 3, for example, 23 mm. The light transmissive film 2 a of the diaphragm 4 as described above is, for example, made of light having at least an optical characteristic which can meet the requirements of the laser light for transmission recording/reproduction. Doc -22- 1279794 Made of a transmissive thermoplastic resin. The thermoplastic resin may be selected from materials having values such as heat resistance dimensional stability, thermal expansion coefficient, or hygroscopic expansion coefficient which are close to the value of the replica substrate la, specifically, for example, polycarbonate (PC) or polymethyl. A methacrylic resin such as polymethylmethacrylate. The thickness of the light-transmitting film 2a is preferably selected from the range of 50 to 100 μm, more preferably from 60 to 80 μm. In the first embodiment, the light-transmitting film 2a is bonded to one main surface of the disk substrate 1 by interposing an adhesive layer 2b composed of a pressure-sensitive adhesive (PSA). The thickness of the transmissive film 2a should be set to, for example, 70 μm. Further, the thickness of the light-transmitting film 2a is determined by considering the wavelength of the laser light for recording/reproduction of the information signal or the film thickness required for the light-transmitting layer 2. Further, the PSA for constituting the adhesive layer is, for example, a methacrylic synthetic tree. The thickness of the adhesive layer 2b is, for example, 30 μm, but the thickness of the adhesive layer 2b or the material used as the pressure-sensitive adhesive should take into consideration the film thickness required for the light-transmitting layer 2, or for recording of information signals. / The wavelength of the regenerated laser light is determined. Further, although not shown, when the diaphragm 4 is in a state of being stored, a protective film for protecting the film 4 is attached to the surface of the adhesive layer 2b of the film 4. Next, a method of bonding the disc substrate 1 and the diaphragm 4 as described above will be described. First, the bonding apparatus for bonding the disc substrate 膜 and the diaphragm 4 will be described below. A bonding apparatus used in the second embodiment is shown in Fig. 6. As shown in Fig. 6, the bonding apparatus of the i-th embodiment is a fixing table 21 109875. Doc -23- 1279794 is constructed in a position opposite to the movable table 22. The fixing table 21 is configured to allow the diaphragm 4 to be placed. Namely, the portion of the fixed table 21 opposed to the movable table 22 is provided so as to protrude from the fixed table 21 and to move the upper and lower moving pins 23 in a direction in which it can be buried. The diameter of the vertical movement pin 23 is the same as the diameter of the through hole 2c of the diaphragm 4. Further, the through hole 2c of the diaphragm 4 is fitted to the lower side of the upper and lower moving pins 23, and the diaphragm 4 is placed on the fixed table 21. Further, a substrate positioning pin 24 projecting in a columnar shape is provided on the upper portion of the upper and lower moving pins 23. The substrate positioning pin 24 has a diameter that is substantially the same as the diameter of the center hole lb of the disc substrate 1, and is configured to support the disc substrate 1 with the lower moving pin 23 positioned below the center of the disc substrate 1. . As described above, the fixing table 21 is configured such that the diaphragm 4 can be fitted to the upper and lower moving pins 23 to be placed, and the disc substrate 1 can be attached to the lower portion of the lower side of the substrate positioning pin 24 and the lower portion of the movable pin 23. support. Further, on the surface of the portion of the movable table 22 with respect to the fixed table 21, a pad 25 made of an elastic body such as rubber is provided. The pad has a conical shape, and the planar side of the conical shape is fixed to the surface of the movable table 22 with respect to the fixed table 21. When the bonding between the disc substrate 1 and the diaphragm 4 is performed by using the bonding apparatus according to the first embodiment configured as described above, the diaphragm 4 is first placed in the vertical movement pin 23 by the through hole 2c. On the fixed table 21. At this time, the film 4 should be placed such that the surface on the side of the adhesive layer 2b is opposed to the movable table 22. Then, the disc substrate 1' is fitted to the substrate positioning pin 24 with its center hole 1b and placed on the stepped portion of the upper and lower moving pins 23. At this time, the disc substrate 1 is supported by the upper and lower movable pins 23 with respect to the bonding surface of the adhesive layer 21) with the surface of the information signal portion 1c on which the signal portion is provided. 109875. Doc -24- 1279794 / Then move the movable table 22 to the fixed table 21 (below the bottom of Fig. 6) and then press the substrate positioning pin 24 with the pad 25, and then insert the I pin 23 into the fixed table via the disk substrate 丨21, whereby the gap between the disc substrate 1 and the diaphragm 4 is gradually reduced, and finally the disc substrate i and the diaphragm 4 are crimped to make the surface of the shell and the adhesive layer of the shell. After the pressure contact is stabilized, the movable table 22 is opened in the direction away from the fixed table 21. Thereafter, the specific transfer device (not shown) is used to carry out the pressure from the fixed table 21. The disc substrate 1 and the diaphragm 4 are connected. By the above process, the disc substrate 1 and the diaphragm 4 can be bonded together to form light on the surface of the information signal portion lc of the disc substrate 1. The optical disc of the transmissive layer 2. With respect to the optical disc prepared as described above, the inventors have manufactured a disc substrate having a different thickness of the reaction preventing layer 15 and compared the disc substrates with each other. Specifically, the replica substrate la A polycarbonate (pc) substrate having a thickness of K1 and a flat annular shape is used, and the information signal portion 丨c is used. : a first dielectric layer 12 composed of a mixture of ZnS and Si〇2 (ZnS_Si〇2) having a thickness of 18 nm on a reflective layer formed of an A1 alloy having a thickness of 100 nm or more A recording layer 13 composed of a GelnSbTe alloy layer having a thickness of 24 nm, a second dielectric layer 14 composed of ZnS-Si〇2, and a reaction preventing layer 15 composed of a dielectric material are sequentially laminated. The thickness of the dielectric layer 14 of the second dielectric layer 14 composed of ZnS-Si 2 in the information signal portion lc is such that the reflectance of the mirror portion is set to be 15% or more. In other words, it is generally necessary for a group of recording/reproduction for information signals used for optical discs to have a reflectance of 丨〇% or more. The reflectance of the group is about 7〇% of the reflectance of the flat mirror portion. 109875. Doc -25- 1279794. Therefore, if good recording/reproduction characteristics are to be obtained in the group, the reflectance at the mirror portion needs to ensure a reflectance of 15% or more. Under such considerations, the inventors have tested the film thickness dependence of the second dielectric layer (ZnS_Si〇2) having a reflectance. The results are shown in Figure 7. As shown in Fig. 7, the inventors have found that the reflectance changes in a sinusoidal waveform as the film thickness of the second dielectric layer 14 increases. Therefore, the film thickness of the second dielectric layer 14 should be selected from the range of the sinusoidal wave shape to be more than 15%, specifically, it should be selected from the range of 45 nm to 90 nm, or 130 nm. In the 175 nm range. In the first embodiment, 丨4〇 nm is selected. The material of the reaction preventing layer 5 in the above information signal portion 丨c is determined as follows. That is, as described above, in the upper layer of the information signal portion 1c, the light-transmitting film 2a is bonded thereto via the adhesive layer 2b composed of a pressure-sensitive adhesive (pSA). Therefore, as the outermost reaction preventing layer 15 constituting the information signal portion, the material should be selected from materials which do not chemically react with the pores of the adhesive layer, and specifically, for example, a tantalum nitride compound should be used. According to the first embodiment, the reaction preventing layer 15 is constituted by a team. In the following, the film substrate 1 according to the first embodiment is configured as the disk substrate 1 of the first embodiment, and the reaction substrate 15 is formed as the outermost layer of the information signal portion lc. The disk substrate 1 of the first embodiment is set to have a film thickness of the reaction preventing layer 15 of 1 nm, and the disk substrate 实施 of the second embodiment is set to 2 nm, and is set to $ nm. In the disc substrate 1 of the third embodiment, the disc substrate 1 which is set to 10 nm in the fourth embodiment is set to 3〇11111, and is the disc substrate 1 of the fifth embodiment. On the other hand, the disc substrate 1 for comparison, specifically, has a thickness of 109,875. Doc -26- 1279794 A cylindrical PC substrate is used as the replica substrate 1 a, and the straight 仏 (outer diameter) of the soil plate is not set to, for example, 1 2 〇mm, so that the opening of the center hole 1 b is 拴 (internal port 敉) sigh for example i 5 melons. In addition, the conventional disc substrate 1 is composed of a ZnS_si〇2 having a film thickness of 18 cm on a reflective crucible composed of an aluminum alloy having a thickness of i 〇〇. The first dielectric layer is composed of a phase change recording layer composed of a 24 nmi GeInSbTe alloy layer and a laminated film formed of a second dielectric layer composed of a film thickness of 14 〇 nm 2 ZnS_si 〇 2 . That is, the disc substrate which is not provided with the reaction preventing layer is used as the disc substrate i of the comparative example. Then, the optical discs produced by using the disc substrate of the first to fifth embodiments and the bonding method according to the above-described bonding method, and the optical discs produced by using the disc substrate i of the comparative example according to the above manufacturing method are respectively implemented. Test of reflectivity change rate. The process is as follows. First, an initial crystallization treatment is applied to each of the optical discs produced by using the disc substrates of the first to fifth embodiments and the comparative examples, whereby the recording layer 13 of the information signal portion is changed from the amorphous state to the crystalline state. . Next, after the initial reflectance was tested, it was placed in a constant temperature and humidity chamber at a temperature of 8 ° C and a humidity of 85% for 1 hour to carry out an accelerated test. Thereafter, the reflectance test was performed on each of the discs taken out from the constant temperature and humidity chamber, and the change in reflectance before and after the accelerated test was tested. Further, the reflectance test was carried out using an optical system evaluation device having a wavelength of nm and a numerical aperture of 〇·85 and a non-concave portion of the optical disk, a so-called mirror portion. The rate of change of reflectance is the quotient of the amount of change in reflectance obtained by subtracting the reflectance after the initial reflectance is accelerated, and dividing by the initial reflectance. The test result of the reflectivity change rate is 109875. Doc -27- 1279794 is shown in the following list i. [Table 1] Comparative Example 1 Example 2nd Example 3rd Example 4th Example Si3N4 Film Thickness [nm] 0 1 2 5 10 30 Initial Reflectance [%] 20 . 0 20. 1 20. 7 21. 2 21. 6 18. 0 After the accelerated test, the reflection [%] 14. 3 17. 2 18. 8 19. 9 20. 8 17. 8 Reflectance change amount [%] 5. 7 2. 9 1. 9 1. 3 0. 8 0. 2 Reflectance change amount Initial reflectance 0. 285 0. 144 0. 092 0. 061 0. 037 0. 011 It can be seen from Table 1 that the optical disc (the optical disc of the first embodiment to the fifth optical disc of the first embodiment) which has been produced by using the disc substrate 1 of the first to fifth embodiments passes the acceleration test result. The reflectance change (reflectance change rate) of the initial reflectance is 0. 011~〇_144, on the other hand, the optical disk produced by the disc substrate 1 of the comparative example (the optical disc of the comparative example) is subjected to an acceleration test, and the reflectance of the reflectance is about two. In the example, the rate of change of the reflectance was twice as high as 0. 285, and a yellow discoloration was also observed in the optical disc of the comparative example. According to the findings obtained by the inventors of the present invention, the yellow discoloration of the pores of the adhesive layer is responsible for the decrease in reflectance. Therefore, by providing the reaction preventing layer 15 at the interface of the information signal portion lc and the adhesion layer hole, the reflectance degradation can be prevented. On the other hand, the relationship between the optical discs of the following embodiments of the fifth to fifth embodiments can be known from the following. That is, the reflectance change rate of the optical disk of the first embodiment in which the film thickness of the reaction preventing layer 15 composed of Si#4 is 1 run is 〇144, whereas the reflectance change of the optical disk having a film thickness of 2 nm is changed. The rate is 〇109875. Doc -28 - 1279794 'It is thus known that the rate of change of reflectivity has decreased. In other words, it can be seen that the phase of the optical disk of the first yoke example has been suppressed by the reflectance of the optical disk of the second embodiment. Similarly, it can be seen that the optical disc of the third embodiment is compared with the optical disc of the second embodiment, and the second disc of the fourth embodiment is compared with the optical disc of the third embodiment, and the fifth is made. When the optical disk of the embodiment is increased in thickness of the reaction preventing layer 15 as compared with the optical disk of the fourth embodiment, the reflectance change rate can be lowered. Further, according to the optical disc of the first to fifth embodiments of the present invention, it has been found that when the reaction preventing layer 15 is provided, the discoloration of yellow is reduced. Further, in general, when the reflectance change rate is larger than 01, the recording/reproduction quality of the information signal is inevitably lowered. Therefore, it must be made larger than 1 nm, preferably larger than 2 nm. Therefore, if the film thickness of the reaction preventing layer 15 is 2 nm or more, the reflectance change rate can be surely made 0.1 or less, and good recording/regeneration characteristics can be ensured. As described above, the optical disk and the method of manufacturing the same according to the first embodiment are provided so as not to be generated between the adhesive layer 2b and the outermost layer of the information signal portion 1c which is the main surface of the disk substrate 1. Since the reaction preventing layer 15 composed of a chemical reaction can prevent discoloration (κ, worry) of the adhesive layer hole between the information signal portion 1 () and the adhesive layer hole even when used for a long period of time, it can be suppressed The reflectance due to discoloration is degraded, and the disc caused by it is degraded. Therefore, it is possible to obtain a disc having a thin film formation, a small birefringence, a good transparency, and a light transmission from the thickness, and which can correspond to the NA of the objective lens and which has good recording and reproducing characteristics. 109875. Doc • 29-1279794 Next, the optical disc according to the second embodiment of the present invention will be described below. According to the optical disc of the second embodiment, the reaction preventing layer 15 is made of yttrium oxide (Si〇2) unlike the second embodiment. Here, the material of the reaction preventing layer 15 is determined as follows. That is, as described above, in the upper layer of the information signal portion lc, the light-transmitting film is bonded thereto by interposing an adhesive layer 2b composed of a pressure-sensitive adhesive (PSA). Therefore, as the reaction preventing layer 15 constituting the outermost layer of the information signal portion lc, the material should be selected from materials which do not chemically react with the adhesive layer 21), and specifically, for example, a tantalum nitride compound should be selected. In the second embodiment, the reaction preventing layer 15 is composed of Si 〇 2 . In the following, the disk substrate 1 according to the second embodiment is configured as the disk substrate i of the second embodiment in which the reaction preventing layer 15 made of Si 2 is used as the outermost layer of the first signal portion 1 c. Further, the disk substrate 实施 of the sixth embodiment in which the film thickness of the reaction preventing layer 15 composed of 〇2 is set to 丨nm is set, and the disk substrate 实施 of the seventh embodiment is set to be 2 nm. The disc substrate of the eighth embodiment is set to 5 nm! The disc substrate 1 of the ninth embodiment is set to 1 〇 nm, and the disc substrate 1 of the first embodiment is not determined to be 3 〇 nm. On the other hand, the disc substrate i to be compared is the same as that of the second embodiment. The disc substrate 1 is used as the disc substrate 1 of the comparative example. The other configuration of the optical disk according to the second embodiment is the same as that of the first embodiment, and therefore will not be described. The method of manufacturing the optical disk is also the same as that of the first embodiment, and therefore will not be described. Further, for the optical disk on which the light-transmitting layer formed by the bonding method according to the first embodiment is applied to the disk substrate 1 of the sixth to tenth embodiments, 109875. Doc -30- 1279794 The reflectance change rate test was carried out separately from the optical discs of the light transmitting layer formed by using the disc substrate 1 of the comparative example in accordance with the same manufacturing method. The process is as follows. First, an initial crystallization treatment is applied to each of the optical discs produced by using the disc substrates of the sixth to tenth embodiments and the comparative examples, whereby the recording layer 13 of the information signal portion lc is changed from an amorphous state to a crystalline state. . After the initial reflectance was tested, it was placed in a constant temperature and humidity chamber at a temperature of 8 ° C and a humidity of 85%, and an accelerated test was performed for 1 hour. Thereafter, the reflectance test was performed on each of the discs taken out from the constant temperature and humidity chamber, and the change in reflectance before and after the accelerated test was tested. In addition, the reflectivity test uses a wavelength of 400 nm and a numerical aperture NA of 0. The 85 optical system evaluation device is implemented for the non-concave portion of the optical disc, the so-called mirror portion. The test results of the reflectance change rate are shown in Table 2 below. [Table 2] Comparative Example 6th Example 7th Embodiment 8th Example 9th Example Si〇2 Film Thickness [nm] 0 1 2 5 10 30 Initial Reflectance [% ] 20. 0 20. 1 20. 6 21. 1 21. 3 18. 4 Reflectance after accelerated test [%] 14. 3 17. 1 18. 8 19. 7 20. 6 17. 9 Reflectance change [%] 5. 7 3. 0 1. 8 1. 4 0. 7 0. 5 Reflectance change amount Initial reflectance 0. 285 0. 149 0,087 0. 066 0. 033 0. As can be seen from Table 2, each of the optical disks (the optical disk of the sixth embodiment to the optical disk of the tenth embodiment) obtained by using the optical disk substrate 1 of the embodiment of the sixth to the first embodiment is accelerated. The test results showed a reflectivity of 109875 with respect to the initial reflectance. Doc -31 - 1279794 The amount of change (reflectance change rate) is 〇〇27~〇149, and _, the disc made by the disc substrate 1 using the rut (Comparative example of the disc), passed the acceleration test As a result, the reflectance change rate is as high as about twice the reflectance change rate of the sixth embodiment. As described in the first embodiment, as in the first embodiment, a yellow discoloration can be observed in the adhesive layer 2b, which is a cause of a decrease in reflectance. Therefore, it is possible to prevent the reflectance from deteriorating by providing the reaction preventing layer 15 composed of "o" in the interface between the information signal portion and the adhesive layer 2b without reacting with the adhesive layer. Further, from Table 2, the following can be known. The relationship between the optical discs of the sixth to the first embodiments is the reflectance change rate of the optical disc of the sixth example of the film thickness of the reaction preventing layer constituting the Si 〇 2 〇·ι49 On the other hand, the reflectance change rate of the optical disk of the seventh embodiment having a film thickness of 2 nm is 0. From 087, it can be seen that the rate of change of reflectance has decreased. In other words, it is understood that the deterioration of the reflectance of the optical disk of the seventh embodiment has been suppressed with respect to the optical disk of the sixth embodiment. Similarly, the optical disk of the eighth embodiment is compared with the optical disk of the seventh embodiment, the optical disk of the ninth embodiment is compared with the optical disk of the eighth embodiment, and the first embodiment is made. When the optical disk is incrementally reacted to prevent the film thickness of the layer 5 compared to the optical disk of the ninth embodiment, the rate of change of the reflection enthalpy can be gradually decreased by $. Further, according to the present invention, the optical disk of the embodiment of the sixth to the first aspect was observed, and as a result, it was confirmed that the yellow discoloration was reduced when the reaction preventing layer 15 was provided. Further, in general, if the rate of change of the reflectance is larger than 〇·丨, the recording/reproduction quality of the information signal is inevitably lowered. Therefore, the thickness of the reaction preventing layer 15 composed of Si〇2 must be at least greater than j nm, preferably greater than 2 109875. Doc -32- 1279794 nm. Therefore, if the film thickness of the reaction preventing layer 15 is 2 or more, the reflectance change rate can be surely made (M or less, and good recording/reproduction characteristics can be ensured. The optical disk and the manufacturing thereof according to the second embodiment) In the method, since the reaction preventing layer 15 composed of 〇2 is formed not to cause a chemical reaction with the bonding layer 2b as the outermost layer of the information signal portion lc which is the main surface of the disc substrate 1, The optical disk according to the third embodiment of the present invention will be described below. The optical disk according to the third embodiment is shown in Fig. 8. As shown in Fig. 8, the present invention is as shown in Fig. 8. In the case of the optical disk of the third embodiment, the reaction preventing resin layer 31 made of an ultraviolet curable resin is provided so as to cover the information signal portion 1B, and the reaction preventing resin layer 31 is formed in the ruthenium reaction. The light transmissive film 2a is bonded to the surface via the adhesive layer 2b, thereby constituting the optical disk. The information signal unit 1 according to the third embodiment is the first and second embodiments as shown in FIG. Form capital In the disc substrate 1 of the third embodiment, the reaction preventing resin layer 31 is provided in the same manner as in the first embodiment. The disc substrate 1 having the reaction preventing resin layer 31 is a disc substrate 1 of a comparative example. Next, the method for manufacturing the optical disc according to the third embodiment will be described below. First, the same copy as in the first embodiment is formed. On the uneven portion of one main surface of the substrate u, a recording film, a reflective film, or the like is formed by a deposition method, whereby an information signal portion 1c is formed. Doc-33- 1279794 According to the disc substrate 1 of the third embodiment, specifically, as shown in Fig. 9, the replica substrate 1a is made of, for example, a disk-shaped polycarbonate having a thickness of 1 · 1 mm. For the ester (PC) substrate, the diameter (outer diameter) of the PC substrate is set to, for example, 120 mm, and the opening diameter (inner diameter) of the center hole lb is set to 15 111111. The information h portion 1 c is used: a first dielectric layer 12 composed of a mixture of ZnS and Si〇2 having a film thickness of 18 nm on a reflective layer 11 composed of an A1 alloy having a film thickness of 1 〇〇nm. a recording layer 13 of a phase changeable recording composed of a GeSbTe alloy layer having a film thickness of 24 nm, and a second dielectric layer composed of a mixture of zinc sulfide (ZriS) and oxidized stone (Si〇2) (ZnS_SiO 2 ) 14, a laminated film formed by sequential lamination. The film thickness of the second dielectric layer 14 composed of ZnS-SiO 2 is set to be 15% or more in the mirror portion as in the case of the third embodiment, and specifically set to 45 to 45. In the range of 90 nm or 130 to 175 nm, in the third embodiment, it is set to 140 run. As for the diaphragm 4, since it is the same as that of the first and second embodiments, it will not be described. Next, the method of forming the reaction preventing resin layer 31 according to the third embodiment as described above will be described below. The method of forming the reaction preventing resin layer 3 according to the third embodiment is shown in Fig. 1 to Fig. 12 . First, as shown in Fig. 10, an ultraviolet curable resin 32 is supplied and applied to one main surface of the disc substrate 1 on which the information signal portion lc is formed. The ultraviolet curable resin 32 is supplied from the mouth of the ultraviolet curable resin supply portion 33 to the inner peripheral side of the disc substrate 1 so as to have a planar annular shape. I09875. Doc -34- 1279794 Next, as shown in Fig. u, the disc substrate coated with the ultraviolet curable resin 32 is oriented in the in-plane direction centering on the rotating shaft (not shown) of the device (in the figure, the master is in the picture) Show 5 Μ direction) rotation. Thereby, the ultraviolet curable resin 32 can be spread over the surface of the disc substrate. The excess ultraviolet curable resin w is opened by the rotation in the direction of the inner surface of the sea, and is coated thereon by the information of the information L # M e covering the reproduction substrate h, thereby forming a film having a uniform thickness. The film thickness ' of the film composed of the ultraviolet curable resin 32 after the creping is adjusted by the number of rotations. Then, as shown in Fig. 12, the replica substrate U coated with the UV-curable tree moonprint is placed in the range of the ultraviolet light source 34 which is illuminable and can emit ultraviolet rays. At this time, the substrate "' should be placed so that the side on which the ultraviolet curable resin 32 is applied is disposed on the side opposite to the ultraviolet light source 34. Thereafter, the ultraviolet light source 34 is hard against the ultraviolet light on one of the main surfaces of the replica substrate u (four) The grease 32 is irradiated with ultraviolet rays. The cumulative strength at this time should be, for example, mJ/cm2. Upon irradiation with ultraviolet rays, the ultraviolet curable resin 32 is hardened on the replica substrate h so as to cover the information signal portion 1 to form a reaction preventing resin layer. 31. Thus, the disc substrate 10 according to the third embodiment can be obtained. With respect to the disc substrate manufactured by the above-described manufacturing method, the inventors have formed the reaction preventing resin layer 31 under various manufacturing conditions. The disc substrate 1 on which the reaction preventing resin layer 31 is formed is the disc substrate of the embodiment. First, a resin having no viscosity and having a viscosity of 4 〇χ 1 〇 2 Pa · s (4 〇 cps) is used as the resin. The coated ultraviolet curable resin 32 is used to form the reaction preventing resin layer 31 on the replica substrate 1a, thereby manufacturing a disc substrate. Doc -35- 1279794 'When the solvent-free resin is supplied to the half (four) of the replica substrate ia, the position: and the rotation axis is medium (10) to make the rotation of 3s•丨 (5_rpm) " . The disc substrate obtained by setting the rotation time at the number of rotations to 1 s (seconds) is the disc substrate i according to the twelfth embodiment when the disc substrate 1' according to the eleventh embodiment is set to 2 s. In the case of 4S, when the disc substrate according to the thirteenth embodiment is set to 〜, when the disc substrate according to the fourteenth embodiment is (10), the disc substrate 1' according to the fifteenth embodiment is set to 20s. The disc substrate 1 according to the sixteenth embodiment is used.乂3 has 50 篁〇/篁〇 of methoxypropanol (meth〇xy^〇pan〇1) and a viscosity of LGx1 (rlpa·s (1G(10) solvent-based resin as coating UV-curable resin 32 The reaction preventing resin layer 31 was formed on the replica substrate 1a, left for 30 seconds, and the solvent was completely released, and then cured by ultraviolet irradiation to produce a disc substrate i. The solvent-type resin was supplied to a position of a radius of 17 mm of the replica substrate la. And rotating the replica substrate at a rotation number of 83 3 (5000 rpm) centering on the rotation axis. The disc substrate obtained by setting the rotation time to ls at the number of rotations is in accordance with the In the disc substrate of the embodiment, the disc substrate 1 according to the ninth embodiment is set to 2 s, and the disc substrate 1 according to the ninth embodiment is set to 4 s, and is set to 7 s. The disc substrate i of the twentieth embodiment is the disc substrate 依照 according to the twenty-first embodiment, and is set to 2 〇s, and is the disc substrate j according to the twenty-second embodiment. The use of the above-described solventless ultraviolet curable resin 32 is carried out in accordance with the implementation of the first to the sixteenth Shu disc substrate 31 to prevent reaction of the film thickness of the resin layer 109,875. Doc -36- 1279794 丨 * * 即 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 在 在 * * 在 * 在 在 在 * 在 在 在 在The test results of the thickness of the resin layer 31 in the outer periphery of the data area (radius 58 (five) (four) and the film thickness difference in the film thickness are shown in the following Table 3. The other is to use the ultraviolet curable resin containing a solvent. The film thickness characteristic test results of the reaction preventing resin layer 31 in the disc substrate i according to the 17th to 22nd embodiments are shown in the following Table 4. [Table 3] Example of the twelfth embodiment of the twelfth embodiment Embodiment of the thirteenth embodiment of the fourteenth embodiment of the fifteenth embodiment of the sixteenth embodiment of the rotation time [S] 1 2 4 7 10 20 average film thickness [μηι] 7. 6 5. 8 4. 3 3. 0 2. 7 1. 9 Inner and outer peripheral film thickness difference [μιη] 2. 3 1. 8 1. 3 1. 0 0. 8 0. [Table 4] Example of Example 17 Example of Example 18 Example of Example 19 Example of Embodiment of Example 21 Example of Embodiment 22 Rotation Time [S] 1 2 4 7 10 20 Average Film Thickness [ Ιιη] 2. 9 2. twenty two. 0 1. 8 1. 7 1. 6 inner and outer peripheral film thickness difference Qxm] 0. 4 0. 3 0. 2 0. 2 0. 1 0. 1 It can be seen from Table 3 that when the reaction preventing resin layer 31 is formed by the spin coating method using the solventless ultraviolet curable resin 32, the average film thickness and the inner and outer peripheral film thickness difference decrease as the rotation time increases. . Further, when the reaction preventing resin layer 31 is formed by spin coating using a solvent-containing ultraviolet curable resin 32, the average film thickness decreases as the rotation time increases, and the inner and outer peripheral film thickness difference is higher than that of Table 3 109875. The disc substrate 1 according to the eleventh to sixteenth embodiments of doc-37- 1279794 becomes very large. When the ultraviolet curable resin is formed by a spin coating method, the film thickness of the outer peripheral portion is larger than the film thickness of the inner peripheral portion. It is understood that the ultraviolet curable resin 32 is preferably a resin containing a solvent, and the solvent is used. The ultraviolet curable resin can make the difference in film thickness on the inner peripheral side of the material region to be 1 μm or less. After the reaction-preventing resin layer 3 is formed as described above, the disc substrate 1 on which the reaction-preventing resin layer 3 is formed is bonded to the same manner as in the first embodiment, and the first embodiment is used. In the case of the diaphragm 4 having the same condition, the optical disc according to the third embodiment can be obtained. The optical disk formed by the film 4 is adhered to the surface of the resin substrate 31 by the reaction of the disk substrate 1 according to the above-described U-22 embodiment (the optical disk according to the embodiment of the second to the 22nd) The initial reflectance and the reflectance test after the acceleration test were carried out in the same manner as in the case of the i-th embodiment, and the rate of change of the reflectance was determined. The optical disc of the comparative example is the same as that of the first embodiment. The test results are shown in Tables 5 and 6 below. [Table 5] Comparative Example No. 11 Example 12th Embodiment Example 13 Example 14 Example 14 Example 15 Example 16 Reaction preventing resin layer film [μιη] 0 7. 6 5. 8 4. 3 3. 0 2. 7 1. 9 Initial reflectance [%] 20. 0 18. 8 18. 9 19. 1 19. 3 19. 5 19. 5 Reflectance after accelerated test [%] 14. 3 18. 5 18. 5 18. 6 18. 7 18.9 18. 8 Reflectance change [° / 〇] 5. 7 0. 3 0. 4 . 0. 5 0. 5 0. 6 0. 7 Reflectance change amount Initial reflectance 0. 285 0. 016 0. 021 0. 026 0. 026 0. 031 0. 036 109875. Doc-38- 1279794 [Table 6] Comparative Example 17 Example 18 Example of Example 19 Example of Example 20 Example of Example 21 Example of reaction preventing resin layer film [μπχ] 0 2. 9 2. twenty two. 0 1. 8 1. 7 1. 6 Initial reflectance [%] 20. 0 19. 3 19. 3 19. 4 19. 5 19. 5 19. 6 Reflectance after accelerated test [%] 14. 3 18. 8 18. 8 18. 8 18. 9 18. 8 18. 8 Reflectance change [° / 〇] 5. 7 0. 5 0. 5 0. 6 0. 6 0. 7 0. 8 Reflectance change amount Initial reflectance 0. 285 0. 026 0. 026 0. 031 0. 031 0. 036 0. 041 It can be seen from Table 5 that the rate of change of the reflectance of the optical disk with respect to the comparative example is as high as 0. 2 8 5 , and in the optical disk according to the embodiment of the above 11 to 16, as long as the reaction preventing resin layer 3 1 is formed. , the reflectance change rate can be reduced. Further, in the optical disc of the comparative example, a yellow discoloration, that is, a so-called yellowing, was observed, but in the optical disc according to the eleventh to sixteenth embodiments, the discoloration of the adhesive layer 2b was very small and transparent. In addition, when the reflectance change rate is generally larger than 〇·1, the recording/reproduction quality of the information signal is degraded, but in the optical disc according to the embodiment of the "~", even in the reaction preventing resin The film thickness of the layer 31 is the smallest according to the embodiment of the sixteenth embodiment, and the reflectance change rate is as small as 〇〇36. Thus, as long as the reaction preventing resin layer 31 is formed, It is confirmed that the reflectance change rate is 〇·! or less, and good recording/reproduction characteristics are ensured. Further, as shown in Table 6, the rate of change of reflectance with respect to the optical disk of the comparative example is as high as 0. In the case of the optical disk according to the embodiment of the seventeenth to twenty-secondth embodiments, as long as the reaction preventing resin layer 31 is formed, the reflectance change rate can be lowered. In the optical disc of the comparative example, a yellow discoloration, that is, a so-called yellowing, is observed, but in the optical disc according to the embodiment of the 17th to 22nd, the discoloration of the adhesive layer hole is very small. Doc -39- 1279794 and transparent. In the optical disk according to the embodiment of the present invention, the optical disk of the embodiment according to the twenty-second embodiment, in which the film thickness of the reaction preventing resin layer 31 is as small as 1·6 μπΐ2, is only 0. 041 is small. From this, it is understood that the reaction rate change rate can be surely set to 〇 1 or less as long as the reaction-preventing resin layer 3 1 is formed, and good recording/reproduction characteristics are ensured. According to the optical disc of the third embodiment of the present invention, the ultraviolet curable resin is applied and cured to cover the information signal portion 1c on the replica substrate amp&, and the reaction preventing resin layer 31 is formed. Since the light-transmitting layer 2 is provided by the reaction preventing resin layer 31, the same effects as in the case of the first embodiment can be obtained. When the optical disk according to the third embodiment is manufactured, the ultraviolet curable resin 32 is applied by a spin coating method to produce a reaction-preventing resin layer 3, and a solvent-containing focal line hardening resin is used to form a data region inside and outside. A light transmitting layer having a small difference in film thickness can be used to manufacture a compact disc which ensures good recording/reproducing characteristics. The above is a specific embodiment of the present invention, but the present invention is not limited to the above embodiment, and various modifications can be made without departing from the technical idea of the present invention. For example, the numerical values, materials, and optical disc structures mentioned in the above embodiments are merely examples of the present invention, and if necessary, values, materials, and optical disc structures different from each other may be used. Further, in the above embodiment, the case where the present invention is applied to a disc having a light transmitting layer will be described, but the present invention is also applicable to an optical hard disk which is reproduced by magneto-optical recording or a detachable optical hard disk. In addition, in the above i-th embodiment, 109875. Doc -40- 1279794, the present invention is applied to a phase change sin-type optical disc that performs information signal recording using phase transition, but the present invention is also applicable to other rewritable optical discs, supplementary optical discs, or reproduction-only Type disc. Alternatively, two sheets of the optical disc according to the above embodiment may be prepared, and then the two optical discs may be bonded to each other on the opposite side to the side on which the light transmitting layer 2 is provided, whereby the double-sided recording can be manufactured. Type of disc. Further, in the first embodiment described above, the information signal portion is formed on the substrate, but the information signal portion may be formed on the opposite surface of the film from the substrate. Further, it is also possible to form a film with a plurality of films and to form irregularities on the film of the outermost layer to form an information signal portion. According to the present invention, it is on the side of the adhesive layer of the information signal portion. Further, there is a reaction preventing layer capable of suppressing an interface between the information signal portion and the adhesive layer provided on one main surface of the substrate, and constituting a reaction between the layer of the outermost surface of the information signal portion and the adhesive layer of the light transmitting layer, and thus the substrate In a disc in which a light-transmitting film is bonded to the main surface via an adhesive layer, the reflectance instability between the optical discs can be suppressed, or the reflectance of the recording/reproduction surface of the optical disc can be changed, and In addition, it is possible to obtain a disc which can correspond to a high transmittance of an objective lens used for recording/reproduction, a light transmissive layer having a small birefringence, a good transparency, and a uniform film thickness, and can also improve the yield of the product. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a bonding apparatus for bonding a disc substrate and a diaphragm in accordance with a conventional technique. Figure 2 shows the first in accordance with the present invention! A cross-sectional view of an optical disc of an embodiment. 109875. Doc -41 - 1279794 Fig. 3 is a cross-sectional view showing the substrate of the disk of Fig. 45 in accordance with the first embodiment of the present invention. "The detailed cross-sectional view of the monument according to the first embodiment of the present invention. 35-piece substrate information signal portion Fig. 5 is a cross-sectional view showing a film for forming a light-transmitting layer according to the first embodiment of the present invention. Fig. 6 is a schematic view showing a laminating apparatus for attaching a disc diaphragm according to a fifth embodiment of the present invention. Fig. 7 is a graph showing the dependence of the thickness of the second dielectric layer film on the reflectance of the optical disk mirror according to the first embodiment of the present invention. Figure 8 is a cross-sectional view showing an optical disk according to a third embodiment of the present invention. Figure 9 is a cross-sectional view showing a disk substrate in accordance with a third embodiment of the present invention. Fig. 1 is a schematic view showing a method of forming a reaction preventing layer according to a third embodiment of the present invention. Fig. 11 is a schematic view showing a method of forming a reaction preventing layer according to a third embodiment of the present invention. Fig. 12 is a schematic view showing a method of forming a reaction preventing layer according to a third embodiment of the present invention. [Main component symbol description] 1 Disc substrate 1 a Copy substrate lb Center hole 1 c Information signal portion 2 Light transmission layer 2a Light transmission film 109875. Doc -42- 1279794 2b Adhesive layer 2c through hole 3 Swell area 3a Clamping reference surface 4 Membrane 11 Reflecting layer 12 First dielectric layer 13 Recording layer 14 Second dielectric layer 15 Reaction preventing layer 21 Fixed table 22 movable station

23 上下動銷 24 基板定位銷 25 墊 31 反應防止樹脂層 32 紫外線硬化樹脂 33 紫外線硬化樹脂供應部 34 紫外線光源 -43 - 109875.doc23 Up and down moving pin 24 Substrate positioning pin 25 Pad 31 Reaction preventing resin layer 32 UV curing resin 33 UV curing resin supply unit 34 UV light source -43 - 109875.doc

Claims (1)

1279794 拾、申請專利範圍 1. 一種光碟，其係 在基板之一主面上， 設有具有複數之層且構成為可將資訊信號加以記錄 及/或加以重現之資訊信號部，與構成為可供用於以上 述資訊信號之記錄及/或重現的雷射光透過之光透射 層者，其特徵為： 上述光透射層至少包括有具有光透射性之膜片，與 用以使上述膜片黏接於基板之一主面的黏合層，且 對於上述資訊信號部之記錄層，至少於設在上述光透 射層側之電介體層與上述黏合層之間設有反應防止層。 2. 如申請專利範圍第1項之光碟，其中之反應防止層係包 含電介體。 3. 如申請專利範圍第2項之光碟，其中之電介體為氮化矽。 4. 如申請專利範圍第3項之光碟，其中包含氮化矽之上述 反應防止層之膜厚為2 nm以上。 5. 如申請專利範圍第2項之光碟，其中之電介體為氧化矽。 6. 如申請專利範圍第5項之光碟，其中包含氧化矽之上述 反應防止層之膜厚為2 nm以上。 7. 如申請專利範圍第1項之光碟，其中之黏合層係包含壓 敏性黏著劑。 8. 如申請專利範圍第1項之光碟，其中之光透射層之膜厚 為90 μπι以上110 μπι以下。 9. 如申請專利範圍第1項之光碟，其中之資訊信號部之膜 79382-940414 分割子案 spec-9503271.doc - 1 - 1279794 厚為183 nm以上313 nm以下。 10· —種光碟之製造方法，其係包含 在基板之-主面上形成構成為可將資訊信號加以記 錄及/或可加以重現的資訊信號邻 观祁之步驟；與 在覆蓋上述資訊信號部之區试，八 ’、 u人 匕埤，介以黏合層而貼合 構成為可供用於資訊信號之記鉾b 4 ^ 心七錄及/或重現的雷射光 透過之光透射性膜片之步驟者；其特徵、· 對於上述資訊信號部之記錄層’至少4於\在光透射性 膜片側之電介體層與上述黏合層之間形成反應防止層。 11. 如申請專利範圍第10項之光碟之製造方法，其中之反 應防止層係包含電介體。 12. 如申請專利範圍第Π項之光碟之製造方法，其中之電 介體為氮化矽。 13. 如申請專利範圍第1 2項之光碟之製造方法，其中將包 含II化砍之上述反應防止層之膜厚形成為2. n m以上。 14. 如申請專利範圍第1 1項之光碟之製造方法，其中之電 介體為氧化矽。 15. 如申請專利範圍第1 4項之光碟之製造方法，其中將包 含氧化石夕之上述反應防止層之膜厚形成為2 nm以上。 16·如申請專利範圍第1 0項之光碟之製造方法，其中之黏 合層係包含壓敏性黏著劑。 17·如申請專利範圍第1 0項之光碟之製造方法，其中將上 述光透射層之膜厚形成為90 μιη以上110 μιη以下。 18.如申請專利範圍第1 0項之光碟之製造方法，其中將上 述資訊信號部之膜厚形成為183 nm以上313 nm以下。 C:\WTNDOWS\Temporary Internet Files\OLKE090\79382-940414 分割子案 spec-9503271.doc - 2 -1279794 Picking up, patent application scope 1. An optical disc, which is provided on one main surface of a substrate, and is provided with an information signal portion having a plurality of layers and configured to record and/or reproduce an information signal, and is configured as The light transmissive layer for transmitting laser light transmitted and/or reproduced by the above information signal is characterized in that: the light transmissive layer comprises at least a film having light transmissivity, and the film is used for The adhesive layer adhered to one of the main surfaces of the substrate, and the recording layer of the information signal portion is provided with a reaction preventing layer at least between the dielectric layer provided on the light transmitting layer side and the adhesive layer. 2. For the optical disc of claim 1, the reaction prevention layer contains a dielectric. 3. For example, in the optical disc of claim 2, the dielectric is tantalum nitride. 4. The optical disc of claim 3, wherein the reaction preventing layer containing tantalum nitride has a film thickness of 2 nm or more. 5. For the disc of the second application of the patent scope, the dielectric is yttrium oxide. 6. The optical disc of claim 5, wherein the film thickness of the reaction preventing layer containing cerium oxide is 2 nm or more. 7. The optical disc of claim 1 wherein the adhesive layer comprises a pressure sensitive adhesive. 8. For the optical disc of claim 1, the light transmission layer has a film thickness of 90 μπι or more and 110 μπι or less. 9. For the disc of the scope of patent application No. 1, the film of the information signal section 79382-940414 is divided into sub-samples spec-9503271.doc - 1 - 1279794 and the thickness is below 183 nm and below 313 nm. 10. A method of manufacturing an optical disc, comprising the steps of forming an information signal adjacent to the main surface of the substrate to record an information signal and/or reproducible; and overlaying the information signal The district's district test, eight ', u people's 匕埤, through the adhesive layer and fit together for the information signal record b 4 ^ heart seven recorded and / or reproduced laser light transmission light transmission film In the step of the sheet, the recording layer of the information signal portion is formed with a reaction preventing layer between at least 4 of the dielectric layer on the light-transmitting film side and the adhesive layer. 11. The method of manufacturing an optical disc according to claim 10, wherein the reaction preventing layer comprises a dielectric. 12. The method of manufacturing an optical disc according to the scope of the patent application, wherein the dielectric is tantalum nitride. 13. The film thickness of the above-mentioned reaction preventing layer comprising II dicing is formed to be 2. n m or more. 14. The method of manufacturing an optical disc according to claim 11 wherein the dielectric is yttrium oxide. 15. The method for producing an optical disk according to claim 14 wherein the film thickness of the reaction preventing layer containing the oxide oxide is formed to be 2 nm or more. 16. The method of manufacturing an optical disc according to claim 10, wherein the adhesive layer comprises a pressure sensitive adhesive. 17. The method of producing a disc according to claim 10, wherein the film thickness of the light transmitting layer is 90 μm or more and 110 μm or less. 18. The method of manufacturing an optical disc according to claim 10, wherein the film thickness of the information signal portion is 183 nm or more and 313 nm or less. C:\WTNDOWS\Temporary Internet Files\OLKE090\79382-940414 Split sub-segment spec-9503271.doc - 2 -
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